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

.stoneforge/sync/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: .stoneforge/sync
 
 ## role
-Distributed task coordination and ephemeral worker agent management for a multi-agent execution system.
+Persists distributed task execution state by storing dependency graphs and ephemeral worker agent records for a collaborative workflow system.
 ## parent
 index: .stoneforge/.pi-map.index.md
 map: .stoneforge/.pi-map.md

.stoneforge/sync/.pi-map.md

@@ -4,12 +4,12 @@ dir: .stoneforge/sync
 index: .stoneforge/sync/.pi-map.index.md
 
 ## role
-Distributed task coordination and ephemeral worker agent management for a multi-agent execution system.
+Persists distributed task execution state by storing dependency graphs and ephemeral worker agent records for a collaborative workflow system.
 ## files
 - dependencies.jsonl | Stores a sequence of dependency relationships between entities in JSON Lines format, tracking parent-child, blocking, and reply relationships with timestamps and creators.
 - elements.jsonl | Stores JSONL records of ephemeral worker agents with their session history, worktree assignments, and lifecycle metadata for a distributed task execution system.
 ## arch
-Event-sourced JSONL append-only logs with entity-relationship graph tracking, session-based worker lifecycle management, and decentralized worktree assignment.
+Event-sourced JSONL append-only logs with entity-relationship modeling (parent-child, blocking, reply) and session-based worker lifecycle tracking.
 ## tags
 stores, relationships, dependencies, elements, sequence, dependency, entities, json
 ## symbols