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).

docs/deployment/.pi-map.index.md

@@ -0,0 +1,22 @@
+# docs/deployment (index)
+dir: docs/deployment
+
+## role
+Provides deployment documentation and operational guides for installing, configuring, and running the Headquarter application in production environments.
+## parent
+index: docs/.pi-map.index.md
+map: docs/.pi-map.md
+## children
+-
+## files
+- authentik.md
+- docker.md
+- environment.md
+- traefik.md
+## links
+index: docs/deployment/.pi-map.index.md
+map: docs/deployment/.pi-map.md
+## workflows
+-
+## dirty
+-