Used co-pilot for complete review of all documentation, including extensive revision of v1.md

docs/error_handling.md

@@ -41,7 +41,7 @@ The system uses stable, implementation-independent categories:
 | --- | --- | --- | --- |
 | `validation_error` | Payload or parameter shape/content is invalid | UI/API input validation, service guards | no |
 | `user_input_error` | User-provided artifact is unacceptable though structurally valid | unsupported file type, empty file, oversized upload | sometimes |
-| `not_found_error` | Requested resource does not exist | missing job/document/transcript | no |
+| `not_found_error` | Requested resource does not exist | missing job/document/source/revision | no |
 | `conflict_error` | Requested operation violates current state constraints | invalid state transition | no |
 | `external_provider_error` | External AI/provider call fails | upstream HTTP/API/provider failures | sometimes |
 | `infrastructure_transient_error` | Temporary environment issue | network timeout, DB connection reset | yes |
@@ -111,7 +111,7 @@ All logged errors must include, where available:
 - `category`
 - `operation` (e.g., `upload.submit`, `worker.process_job`, `jobs.refresh`)
 - `exception_type`
-- `job_id`, `document_id` (when relevant)
+- `job_id`, `document_id`, `source_id` (when relevant)
 - UTC timestamp
 
 Rules:
@@ -271,7 +271,7 @@ Change requirements:
 - [System overview](index.md)
 - [Architecture](architecture.md)
 - [Requirements](requirements.md)
-- [Intent](intent.md)
+- [Intent](Intent.md)
 
 ## Glossary