chore: patch project maps after stale backend test cleanup

Regenerate .pi-map*.md artifacts for source changes in:
- apps/api/src/api/tool/tool_types_validation.py
- apps/api/src/schemas/tool/tool_type.py
- apps/api/tests/integration/test_tool_types_api_extended.py
- and all affected test files from backend-frontend refactoring cleanup

apps/api/alembic/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: apps/api/alembic
 
 ## role
-Database migration tooling that manages schema versioning and changes for the API's PostgreSQL database using Alembic with async SQLAlchemy.
+Database migration infrastructure for managing schema evolution with async SQLAlchemy support.
 ## parent
 index: apps/api/.pi-map.index.md
 map: apps/api/.pi-map.md