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/changes/archive/2026-05-18-simplify-authentik-auth/specs/.pi-map.index.md

@@ -0,0 +1,19 @@
+# openspec/changes/archive/2026-05-18-simplify-authentik-auth/specs (index)
+dir: openspec/changes/archive/2026-05-18-simplify-authentik-auth/specs
+
+## role
+Defines authentication specification for a simplified OAuth2 integration with Authentik using stateless signed session cookies
+## parent
+index: openspec/changes/archive/2026-05-18-simplify-authentik-auth/.pi-map.index.md
+map: openspec/changes/archive/2026-05-18-simplify-authentik-auth/.pi-map.md
+## children
+-
+## files
+- spec.md
+## links
+index: openspec/changes/archive/2026-05-18-simplify-authentik-auth/specs/.pi-map.index.md
+map: openspec/changes/archive/2026-05-18-simplify-authentik-auth/specs/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/changes/archive/2026-05-18-simplify-authentik-auth/specs/.pi-map.md

@@ -0,0 +1,19 @@
+# openspec/changes/archive/2026-05-18-simplify-authentik-auth/specs
+dir: openspec/changes/archive/2026-05-18-simplify-authentik-auth/specs
+
+index: openspec/changes/archive/2026-05-18-simplify-authentik-auth/specs/.pi-map.index.md
+
+## role
+Defines authentication specification for a simplified OAuth2 integration with Authentik using stateless signed session cookies
+## files
+- spec.md | Defines a simplified OAuth2 authentication flow using Authentik with stateless signed session cookies | dep: Authentik, HMAC-SHA256, OAuth2
+## arch
+Specification-driven design with markdown-based technical documentation for authentication flow requirements
+## tags
+oauth2, authentik, spec, defines, simplified, authentication, flow, stateless
+## symbols
+-
+## workflows
+-
+## dirty
+-