feat: Add Gitea release cleanup executor

- Add gitea_release_cleanup_executor for automated release cleanup
- Add GITEA_TOKEN setting for API token authentication
- Configurable retention count, repo exclusions, and dry-run mode
- Designed to run daily before Watchtower (3 AM)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "the-scheduler"
-version = "1.0.4"
+version = "1.1.0"
 description = "System-wide maintenance orchestration - backups, doc mirroring, cleanup, task automation"
 readme = "README.md"
 requires-python = ">=3.12"