gpt-5.3-codex review phase 1 - Flatten the documentation

docs/ver4/index_v4.md

@@ -1,13 +1,14 @@
 # Document Transcription System Overview (Version 4)
 
-Version 4 is the architecture baseline for the personal-scale application used to transcribe, organize, and preserve historical documents, source images, and related people records.
+This directory is the single source of truth for current V4 behavior and architecture.
 
-## Recommended Reading Order
+## Canonical Reading Order
 
-1. [System Architecture](architecture_v4.md) for capabilities, technical stack, runtime structure, workflows, and component ownership.
-2. [System Requirements](requirements_v4.md) for the verifiable V4 contract.
-3. [Data Model](schema_v4.md) for entities, relationships, constraints, and persistence rules.
-4. [Error Handling Policy](error_handling_v4.md) for the V4 taxonomy and boundary contracts.
+1. [System Architecture](architecture_v4.md) for runtime topology, boundaries, and lifecycle ownership.
+2. [System Requirements](requirements_v4.md) for verifiable current-state requirements.
+3. [Data Model](schema_v4.md) for entities, constraints, and evidence persistence rules.
+4. [Error Handling Policy](error_handling_v4.md) for category, translation, and retry behavior.
+5. [V4 Revision History](history.md) for superseded scope and implementation documents.
 
 ## Cross-Version Invariants
 
@@ -17,16 +18,7 @@ Version 4 is the architecture baseline for the personal-scale application used t
 - [Digital Evidence and AI Processing Provenance](../invariant/ai_evidence_and_provenance.md)
 - [UI Style Guide](../invariant/ui_style_guide.md)
 
-## V4 Transition Documents
+## Baseline Statement
 
-- [Scope Boundary](scope_boundary_v4.md)
-- [Implementation Plan](implementation_plan_v4.md)
-
-## Incremental Revisions
-
-- [V4.1 Scope](../ver4.1/scope_boundary_v4_1.md) and [Implementation Plan](../ver4.1/implementation_plan_v4_1.md)
-- [V4.2 Evidence and Provenance Scope](../ver4.2/scope_boundary_v4_2.md) and [Implementation Plan](../ver4.2/implementation_plan_v4_2.md)
-- [V4.3 Settings Scope](../ver4.3/scope_boundary_v4_3.md) and [Implementation Plan](../ver4.3/implementation_plan_v4_3.md)
-- [V4.4 Semantic Registries, Linked People, and Printing Scope](../ver4.4/scope_boundary_v4_4.md) and [Implementation Plan](../ver4.4/implementation_plan_v4_4.md)
-- [V4.5 Transcription Input Normalization and Quality Scope](../ver4.5/scope_boundary_v4_5.md) and [Implementation Plan](../ver4.5/implementation_plan_v4_5.md)
-- [V4.6 Architecture Conformance and Reliability Scope](../ver4.6/scope_boundary_v4_6.md) and [Implementation Plan](../ver4.6/implementation_plan_v4_6.md)
+The current V4 baseline includes behavior delivered through V4.7 architectural cleanup.
+Versioned V4.x scope and implementation documents are retained as historical records only at git tag `docs-v4x-archive` and do not define active contracts.