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# System Architecture (Current Baseline: V5.1)
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# System Architecture (Current Baseline: V6.1)
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This document defines the current V5.1 architecture baseline.
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This document defines the current V6.1 architecture baseline.
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## Architecture Objectives
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@@ -13,10 +13,11 @@ This document defines the current V5.1 architecture baseline.
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- **Runtime:** Python 3.12+
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- **Web application:** FastAPI + NiceGUI
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- **Persistence:** SQLModel / SQLAlchemy (SQLite-first, PostgreSQL-compatible model design)
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- **Persistence:** SQLModel / SQLAlchemy — PostgreSQL in production, SQLite for local development and tests
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- **Validation and settings:** Pydantic V2 + pydantic-settings
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- **Concurrency:** asyncio worker loop
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- **Provider integration:** OpenRouter adapter behind provider interface
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- **Deployment:** Docker Compose (app, worker, PostgreSQL, Cloudflare Tunnel)
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- **Quality and tests:** Ruff, ty, pytest, pytest-asyncio
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## Runtime Topology
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flowchart LR
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U[Browser User] --> A[FastAPI + NiceGUI App]
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A --> W[Asyncio Worker]
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A --> DB[(SQLite/PostgreSQL Model)]
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A --> DB[(PostgreSQL / SQLite)]
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W --> P[Provider Adapter]
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W --> DB
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```
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For production split-process deployments, the worker may run as a dedicated service
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while the app process runs with `RUN_EMBEDDED_WORKER=false`.
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The worker loop drains two queues in the same pass: queued transcription Jobs and queued
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`MaintenanceRun` records. When neither has work, it idles.
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### Production deployment
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Production runs as a Docker Compose stack with the app and worker as separate services, so the app
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process runs with `RUN_EMBEDDED_WORKER=false` and the worker process owns queue draining. Local
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development runs a single process with the worker embedded.
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```mermaid
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flowchart LR
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I[Internet] --> CF[cloudflared tunnel + Access]
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CF --> APP[app service]
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APP --> PG[(postgres service)]
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WK[worker service] --> PG
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WK --> PROV[OpenRouter]
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```
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Deployment, rollback, and recovery procedures are in [Production Runbook](production-runbook.md);
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backup configuration and restore are in [Backup and Restore](backup_restore.md).
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## Layered Boundaries
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### Service and Orchestration Layer
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Aggregate services:
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- `src/transcription/services/documents.py`
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- `src/transcription/services/people.py`
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- `src/transcription/services/jobs.py`
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- `src/transcription/services/sources.py`
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- `src/transcription/services/evidence.py`
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- `src/transcription/services/photos.py`
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- `src/transcription/services/maintenance.py`
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- `src/transcription/services/evidence.py` (read/projection only)
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Orchestration modules:
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- `src/transcription/services/store.py`
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- `src/transcription/services/workflows.py`
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- Aggregate ownership and invariants.
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- Transaction-aware write helpers.
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- Cross-service workflows in orchestration modules (`store.py`, `workflows.py`).
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- Lookup-table CRUD through the generic `RegistryService` base (`registry.py`), which is not an
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aggregate owner itself.
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Module classification and per-model ownership are defined in
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[services instructions](../.github/instructions/services.instructions.md).
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### Persistence Layer
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- `Job` is an aggregate processing run with status and frozen prompt/runtime settings.
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- `JobSource` is queue/membership state for one `(job, source)` pair.
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- `ExecutionAttempt` is append-only evidence for each provider call.
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- `Photo` is person imagery owned by `PhotosService`.
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- `MaintenanceRun` is one queued or executed operational maintenance run.
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- `DocumentType` and `PersonRole` are UUID-backed registries with optional protected `semantic_key`.
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- `Tag` is a shared registry reached through both document and person tagging, linked by
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`DocumentTag` and `PersonTag`.
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## Processing and Evidence Workflow
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- **Job statuses:** `queued`, `processing`, `transcribed`, `partial_success`, `failed`
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- Operational success path resolves to `transcribed`.
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- **JobSource statuses:** `pending`, `transcribed`, `failed`, `cancelled`
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- **MaintenanceRun statuses:** `queued`, `processing`, `succeeded`, `failed`
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- Maintenance uses `succeeded` rather than `transcribed`; the transcription vocabulary does not
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apply to operational runs.
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- **Maintenance job types:** `backup`, `storage_reconciliation`
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## Maintenance Execution
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Operational maintenance is queue-backed rather than run inline from the UI, so it survives request
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lifetime and is recorded:
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1. Settings enqueues a `MaintenanceRun` with `status=queued` and a `triggered_by` marker.
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2. The worker claims the oldest queued run with a conditional update, moving it to `processing`.
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3. `backup` runs the deploy backup script; `storage_reconciliation` compares stored media against
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`Document`/`Source` records.
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4. The run finalizes to `succeeded` or `failed` with summary, timing, log path, and `error_detail`.
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`MaintenanceRun` records operational history and is not evidence in the `ExecutionAttempt` sense;
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append-only guarantees apply to transcription attempts.
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## Security and Path Handling Boundaries
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@@ -168,5 +221,7 @@ Current architecture rules live in `docs/*`.
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- [System Requirements](requirements.md)
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- [Data Model](schema.md)
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- [Error Handling Policy](error_handling.md)
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- [Production Runbook](production-runbook.md)
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- [Backup and Restore](backup_restore.md)
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- [Error Handling invariant](./invariant/error_handling.md)
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- [AI evidence invariant](./invariant/ai_evidence_and_provenance.md)
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# Error Handling Policy (Current Baseline: V5.1)
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# Error Handling Policy (Current Baseline: V6.1)
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This policy defines the active V5.1 error taxonomy, translation boundaries, and retry semantics.
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This policy defines the active V6.1 error taxonomy, translation boundaries, and retry semantics.
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## Error Categories
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# Document Transcription System Overview (Current Baseline: V5.1)
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# Document Transcription System Overview (Current Baseline: V6.1)
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This directory is the single source of truth for current V5.1 behavior and architecture.
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This directory is the single source of truth for current V6.1 behavior and architecture.
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## Canonical Reading Order
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- [Digital Evidence and AI Processing Provenance](./invariant/ai_evidence_and_provenance.md)
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- [UI Style Guide](./invariant/ui_style_guide.md)
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## Deployment and Operations
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- [Production Runbook](production-runbook.md) for deploy, rollback, and recovery.
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- [Backup and Restore](backup_restore.md) for backup configuration and restore procedure.
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- [Data Migration](data_migration.md) for the SQLite to PostgreSQL migration path.
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- [Cloudflare Tunnel and Access](cloudflare_tunnel_access.md) for remote exposure and access control.
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## Baseline Statement
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The current V5.1 baseline includes behavior delivered through the architectural cleanup phases and person-schema redesign.
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The current V6.1 baseline includes behavior delivered through the architectural cleanup phases and
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person-schema redesign (through V5.1), the V6.0 hosting migration to a containerized PostgreSQL
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deployment, and the V6.1 navigation, Document Detail, and worker-backed maintenance refinements.
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Use this `docs/*` canonical set for active design and implementation decisions.
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Every canonical document above states this same baseline; `tests/test_meta_contract_guards.py`
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fails if one of them falls behind. Forward-looking work is tracked in
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[`roadmap_plan.md`](roadmap_plan.md) and is not part of the baseline.
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# System Requirements (Current Baseline: V5.1)
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# System Requirements (Current Baseline: V6.1)
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These requirements define the active V5.1 contract and align to current implementation.
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These requirements define the active V6.1 contract and align to current implementation.
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Requirement IDs encode the baseline that introduced them (`REQ-4-*` from V4, `REQ-6-*` from V6) and
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are stable. Never renumber an existing ID; retire it explicitly instead.
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## Functional Requirements
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- **REQ-4-041 Partial Failure Visibility:** Mixed page outcomes must be visible at job and page level.
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- **REQ-4-042 Retry Support:** Failed and cancelled pages must support targeted retranscription without requiring full document recreation.
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### Person Imagery
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- **REQ-6-001 Photo Records:** The system must store reusable `Photo` records that are either owned by a `Person` or unowned for homepage gallery use.
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- **REQ-6-002 Primary Photo:** At most one photo per owning `Person` may be marked `is_primary`; setting a new primary must clear the previous one.
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- **REQ-6-003 Primary Reassignment:** Deleting an owner's primary photo must promote a remaining photo of that owner rather than leaving the owner without a primary.
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### Operational Maintenance
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- **REQ-6-010 Queued Maintenance Runs:** Settings-initiated maintenance must persist a `MaintenanceRun` and execute in the worker, not inline in the request that started it.
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- **REQ-6-011 Maintenance Run Types:** `MaintenanceRun.job_type` must use one of `backup`, `storage_reconciliation`.
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- **REQ-6-012 Maintenance Status Lifecycle:** `MaintenanceRun.status` must use one of `queued`, `processing`, `succeeded`, `failed`.
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- **REQ-6-013 Single Claim:** A queued run must be claimed by at most one worker, using a conditional status update rather than read-then-write.
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- **REQ-6-014 Run History:** Completed runs must retain status, timing, summary, log reference, and error detail, and expose the log for viewing and download.
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### Deployment and Runtime Configuration
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- **REQ-6-020 Production Persistence:** Production must run against PostgreSQL; SQLite remains supported for local development and tests.
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- **REQ-6-021 Split Worker Deployment:** Production must support running the worker as its own process with the app started at `RUN_EMBEDDED_WORKER=false`.
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- **REQ-6-022 Runtime Settings Persistence:** Runtime settings edits must persist to the mounted production environment file and survive container restart.
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- **REQ-6-023 Configuration Contract Sync:** `.env.production.example` must stay synchronized with `Settings` keys and production-safe defaults.
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- **REQ-6-024 Health Reporting:** The deployed stack must report app and worker health through `/healthz`.
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- **REQ-6-025 Backup and Restore:** Database and media/config backups must be produced on a host-visible path with a tested restore procedure.
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## Non-Functional Requirements
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- **REQ-4-100 Boundary Integrity:** UI pages/components must not access persistence directly and must call service APIs.
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- UI boundary enforcement: `tests/test_ui_boundaries.py`
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- Job lifecycle reliability and terminal status behavior: `tests/services/test_workflows_reliability.py`
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- Evidence append-only and projection behavior: `tests/services/test_store.py`, `tests/services/test_transcription_service.py`
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- Person photo ownership and primary selection: `tests/services/test_photo_service.py`
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- Maintenance run lifecycle and worker execution: `tests/services/test_maintenance_service.py`
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- Runtime settings persistence: `tests/ui/test_runtime_settings_store.py`, `tests/services/test_settings_services.py`
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- Configuration contract synchronization: `tests/test_meta_contract_guards.py`
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- Deployment health reporting: `tests/api/test_health.py`
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## Traceability Notes
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- [People](pages/people.md)
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- [Jobs](pages/jobs.md)
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- [Sources](pages/sources.md)
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- [Settings](pages/settings.md)
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NiceGUI registers the routes shown in each contract without the `/ui` prefix. The application mounts NiceGUI under `/ui`, so `/documents` in page code is served to a browser as `/ui/documents`.
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## Current Baseline
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These contracts describe the current V5.1 baseline.
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These contracts describe the current V6.1 baseline.
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