1. Added 'entry' alias for 'journal_entry' in object definitions.\n2. Updated nested router to resolve physical table names from the registry before ID resolution.\n3. Updated ID resolution helpers to recognize 'entry' prefix.\nThis resolves 404 errors when using shorter aliases in nested paths (e.g., /journal/{id}/entry/).
- Updated V3 CRUD routers to return 400 Bad Request for database schema
errors (unknown columns) across all list and search endpoints.
- Fixed serialization issue in nested patch endpoint.
- Overhauled Section 7 of Frontend Integration Guide to document HTTP
status code mappings for common error categories.
- Updated api_crud_v3 and api_crud_v3_nested to detect 'database_schema'
errors (like Unknown Column) and return a 400 Bad Request instead of
a generic 500 Internal Server Error.
- Added missing error handling for sql_select failure in get_child_obj_li.
- Updated app/db_sql.py to capture SQL exceptions in thread-local storage for later retrieval.
- Implemented format_db_error() in app/lib_api_crud_v3.py to clean up raw MariaDB error strings.
- Added POST /v3/crud/{obj_type}/validate endpoint for dry-run payload validation.
- Updated main and nested routers to bubble up validation and database errors into the response 'meta.details' field.
- Added tests/test_v3_error_bubbling.py to verify formatting logic.
- Created app/routers/api_crud_v3_nested.py to handle all parent-child relational routes.
- Updated app/routers/api_crud_v3.py to include the nested router, significantly reducing file size.
- Documented Phase 2 completion in documentation/REFACTOR_API_CRUD_V3.md.
