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/src/services/.pi-map.md

@@ -4,11 +4,11 @@ dir: apps/api/src/services
 index: apps/api/src/services/.pi-map.index.md
 
 ## role
-Initializes the services directory as a Python package for business logic modules.
+This directory is intended to contain service-layer business logic modules for the API application.
 ## files
 - __init__.py | Empty file with no functionality
 ## arch
-Standard Python package structure using empty __init__.py for namespace declaration.
+Empty package placeholder following standard Python package structure with no implemented architecture yet.
 ## tags
 init, empty, functionality
 ## symbols