- Add _run_startup_health_checks() function in fastapi_app.py
- Check ffmpeg availability (warning)
- Check DNS resolution for aniworld.to and api.themoviedb.org (warning)
- Check anime_directory configuration and writability (error)
- Store startup checks in app.state for health endpoint access
- Add /health/ready endpoint for container orchestrators
- Returns not_ready with 503 when critical failures present
- Includes critical_failures list for debugging
- Update /health endpoint to include startup check results
- Status reflects worst check (error > warning > ok)
- Document health check endpoints in DEVELOPMENT.md
- Add unit tests for startup health checks
- Add unit tests for /health/ready endpoint
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>