- Added shutdown handler in docker-entrypoint.sh to manage application termination signals.
- Introduced shutdown manager to track active jobs and ensure state persistence during shutdown.
- Enhanced cleanup service to support stopping and status retrieval.
- Integrated signal handlers for proper response to termination signals (SIGTERM, SIGINT, SIGHUP).
- Updated middleware to initialize shutdown manager and cleanup service.
- Created integration tests for graceful shutdown functionality, verifying job state preservation and recovery.
- Documented graceful shutdown process and configuration in GRACEFUL_SHUTDOWN.md and SHUTDOWN_PROCESS.md.
- Added new scripts for testing shutdown behavior and cleanup.
