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).

scripts/.pi-map.index.md

@@ -0,0 +1,21 @@
+# scripts (index)
+dir: scripts
+
+## role
+Operational utility scripts for database maintenance and security management in containerized production environments.
+## parent
+index: ./.pi-map.index.md
+map: ./.pi-map.md
+## children
+-
+## files
+- fix_ghost_migration.sh
+- update_db_password.py
+## links
+index: scripts/.pi-map.index.md
+map: scripts/.pi-map.md
+## workflows
+- change scripts behavior
+  read: fix_ghost_migration.sh, update_db_password.py
+## dirty
+-