# Tasks: comic download reliability

- [x] Specify preservation rules, monitoring behavior, and upgrade acceptance before implementation.
- [x] Inspect downloader integrity settings and Uptime Kuma Docker-health behavior.
- [x] Implement authenticated worker health, stall detection, and regression tests.
- [x] Implement stable, verified cleanup and quarantine with failure/restart tests.
- [x] Add and prove the isolated candidate-image upgrade gate.
- [x] Update stack contracts and pass focused and repository validation.
- [x] Configure and verify Uptime Kuma health monitors and existing notification assignments.
- [x] Back up, verify restores, deploy safeguards, and enable Mylar automatic failure recovery.
- [x] Verify live data preservation and behavior; remove temporary backups after success.
- [x] Populate and refresh the DDL percentage column, verify the deployed image and live queue.