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/schemas/system/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: apps/api/src/schemas/system
 
 ## role
-Provides Pydantic schemas for system health monitoring endpoints in the API.
+Provides Pydantic schema definitions for system health monitoring API responses.
 ## parent
 index: apps/api/src/schemas/.pi-map.index.md
 map: apps/api/src/schemas/.pi-map.md

apps/api/src/schemas/system/.pi-map.md

@@ -4,12 +4,12 @@ dir: apps/api/src/schemas/system
 index: apps/api/src/schemas/system/.pi-map.index.md
 
 ## role
-Provides Pydantic schemas for system health monitoring endpoints in the API.
+Provides Pydantic schema definitions for system health monitoring API responses.
 ## files
 - __init__.py | Re-exports health check schema classes from a submodule to provide a unified interface for the system schemas module. | dep: src.schemas.system.health
 - health.py | Defines Pydantic data models for health check API responses including database, disk, and overall system health status. | exp: class:DatabaseHealth, class:DiskHealth, class:HealthChecks, class:HealthResponse, class:DatabaseHealthResponse | dep: pydantic
 ## arch
-Simple submodule pattern with explicit re-exports in __init__.py, using Pydantic models for structured API response validation.
+Simple modular schema layer with submodule organization and re-export pattern for clean API surface.
 ## tags
 health, database, response, system, disk, check, schemas, init
 ## symbols