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/.pi-map.index.md

@@ -0,0 +1,51 @@
+# apps/api/src (index)
+dir: apps/api/src
+
+## role
+Core application package for the Headquarter API backend service, providing configuration, database connectivity, structured logging, and FastAPI application orchestration.
+## parent
+index: apps/api/.pi-map.index.md
+map: apps/api/.pi-map.md
+## children
+- apps/api/src/api
+  index: apps/api/src/api/.pi-map.index.md
+  map: apps/api/src/api/.pi-map.md
+- apps/api/src/auth
+  index: apps/api/src/auth/.pi-map.index.md
+  map: apps/api/src/auth/.pi-map.md
+- apps/api/src/models
+  index: apps/api/src/models/.pi-map.index.md
+  map: apps/api/src/models/.pi-map.md
+- apps/api/src/schemas
+  index: apps/api/src/schemas/.pi-map.index.md
+  map: apps/api/src/schemas/.pi-map.md
+- apps/api/src/scripts
+  index: apps/api/src/scripts/.pi-map.index.md
+  map: apps/api/src/scripts/.pi-map.md
+- apps/api/src/seeds
+  index: apps/api/src/seeds/.pi-map.index.md
+  map: apps/api/src/seeds/.pi-map.md
+- apps/api/src/services
+  index: apps/api/src/services/.pi-map.index.md
+  map: apps/api/src/services/.pi-map.md
+- apps/api/src/utils
+  index: apps/api/src/utils/.pi-map.index.md
+  map: apps/api/src/utils/.pi-map.md
+## files
+- __init__.py
+- config.py
+- database.py
+- logging_config.py
+- main.py
+## links
+index: apps/api/src/.pi-map.index.md
+map: apps/api/src/.pi-map.md
+## workflows
+- change src behavior
+  read: __init__.py, config.py, database.py
+- change src config
+  read: config.py, logging_config.py
+- explore src subdirectories
+  index: apps/api/src/api/.pi-map.index.md, apps/api/src/auth/.pi-map.index.md, apps/api/src/models/.pi-map.index.md
+## dirty
+-