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).

openspec/specs/git-repo/.pi-map.index.md

@@ -0,0 +1,19 @@
+# openspec/specs/git-repo (index)
+dir: openspec/specs/git-repo
+
+## role
+Defines the specification for a bare git repository management service that coordinates on-disk git storage with database-backed metadata.
+## parent
+index: openspec/specs/.pi-map.index.md
+map: openspec/specs/.pi-map.md
+## children
+-
+## files
+- spec.md
+## links
+index: openspec/specs/git-repo/.pi-map.index.md
+map: openspec/specs/git-repo/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/specs/git-repo/.pi-map.md

@@ -0,0 +1,19 @@
+# openspec/specs/git-repo
+dir: openspec/specs/git-repo
+
+index: openspec/specs/git-repo/.pi-map.index.md
+
+## role
+Defines the specification for a bare git repository management service that coordinates on-disk git storage with database-backed metadata.
+## files
+- spec.md | Specifies requirements for managing bare git repositories on disk with database metadata, including creation, SSH key association, cloning, listing, deletion, and duplicate prevention. | dep: Database models (GitRepository, Project, User), Docker volume for repo storage
+## arch
+Domain-driven specification pattern with clear separation between storage concerns (filesystem git operations) and metadata concerns (database records), using SSH key-based access control and duplicate prevention logic.
+## tags
+spec, specifies, requirements, managing, bare, git, repositories, disk
+## symbols
+-
+## workflows
+-
+## dirty
+-