feat: enable automatic container updates with dockcheck labels

- Configure dockcheck for automatic updates instead of check-only mode
- Add dockcheck update labels to Calibre and Changedetection services
- Enable OnlyLabel and AutoMode for targeted container management

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

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

roles/cron/templates/dockcheck.config.j2

@@ -1,6 +1,8 @@
 # Dockcheck Configuration - Check only, no updates
 # Don't update, just check for updates
-DontUpdate=true
+# DontUpdate=true
+OnlyLabel=true
+AutoMode=true 
 
 # Enable notifications
 Notify=true