chore: track all project map and index files

Add generated .pi-map.md and .pi-map.index.md files across the repository
so the project navigation maps are shared and versioned. These artifacts
are maintained by project_map_init/patch/validate and must be kept in
sync with source edits.

Note: .cache/ remains ignored (added in previous commit).

apps/api/src/services/shared/.pi-map.index.md

@@ -0,0 +1,28 @@
+# apps/api/src/services/shared (index)
+dir: apps/api/src/services/shared
+
+## role
+Provides reusable, cross-cutting infrastructure services for the API including I/O safety, container operations, user notifications, request tracing, and workspace lifecycle management.
+## parent
+index: apps/api/src/services/.pi-map.index.md
+map: apps/api/src/services/.pi-map.md
+## children
+-
+## files
+- __init__.py
+- correlation.py
+- file_service.py
+- notification_service.py
+- permission_fixer.py
+- readiness_probe.py
+- ssh_keys.py
+- tunnel.py
+- workspace_manager.py
+## links
+index: apps/api/src/services/shared/.pi-map.index.md
+map: apps/api/src/services/shared/.pi-map.md
+## workflows
+- change shared behavior
+  read: __init__.py, correlation.py, file_service.py
+## dirty
+-