- Added new documentation references for access layer governance in CLAUDE.md, including multi-tenancy and endpoint audit guidelines.
- Updated ACCESS_LAYER_AND_GOVERNANCE_PLAN.md to include cursor and heuristic checks for access layer compliance.
- Enhanced ACCESS_LAYER_ENDPOINT_AUDIT.md to clarify endpoint visibility and governance requirements, including exemptions for certain routers.
- Introduced library_content_visible_to_profile function in club_tenancy.py to streamline visibility checks for library content.
- Updated exercise progression graphs router to utilize the new visibility function, improving access control.
- Bumped application version to 0.8.27 and updated changelog to reflect these changes.
- Introduced tenant context resolution in the profiles API, allowing for effective club identification based on user memberships.
- Updated the `GET /profiles/me` endpoint to return `effective_club_id` and removed reliance on the deprecated `X-Active-Club-Id` header.
- Bumped application version to 0.8.22 in both backend and frontend files.
- Enhanced changelog to document the new version and changes made in this release.
