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/2026-05-19-api-documentation/specs/.pi-map.index.md

@@ -0,0 +1,19 @@
+# openspec/changes/archive/2026-05-19-api-documentation/specs (index)
+dir: openspec/changes/archive/2026-05-19-api-documentation/specs
+
+## role
+Defines API documentation standards and health endpoint specifications for a FastAPI-based project.
+## parent
+index: openspec/changes/archive/2026-05-19-api-documentation/.pi-map.index.md
+map: openspec/changes/archive/2026-05-19-api-documentation/.pi-map.md
+## children
+-
+## files
+- spec.md
+## links
+index: openspec/changes/archive/2026-05-19-api-documentation/specs/.pi-map.index.md
+map: openspec/changes/archive/2026-05-19-api-documentation/specs/.pi-map.md
+## workflows
+-
+## dirty
+-

openspec/changes/archive/2026-05-19-api-documentation/specs/.pi-map.md

@@ -0,0 +1,19 @@
+# openspec/changes/archive/2026-05-19-api-documentation/specs
+dir: openspec/changes/archive/2026-05-19-api-documentation/specs
+
+index: openspec/changes/archive/2026-05-19-api-documentation/specs/.pi-map.index.md
+
+## role
+Defines API documentation standards and health endpoint specifications for a FastAPI-based project.
+## files
+- spec.md | Defines API documentation requirements, health endpoint specifications, and documentation standards for a FastAPI-based project | dep: FastAPI, OpenAPI, Pydantic, Swagger UI, ReDoc
+## arch
+Specification-driven documentation using Markdown-based API contracts with standardized health check patterns.
+## tags
+documentation, fastapi, spec, defines, api, requirements, health, endpoint
+## symbols
+-
+## workflows
+-
+## dirty
+-