feat: Prepare Zemailnator for Dokploy deployment

- Add highly optimized Dockerfile with Nginx and PHP-FPM 8.4
- Add docker-compose.yml configured with Redis and MariaDB 10.11
- Implement entrypoint.sh and supervisord.conf for background workers
- Refactor legacy IMAP scripts into scheduled Artisan Commands
- Secure app by removing old routes with hardcoded basic auth credentials
- Configure email attachments to use Laravel Storage instead of insecure public/tmp

app/Filament/Resources/PlanResource.php

@@ -301,6 +301,7 @@ class PlanResource extends Resource
 
                                     // Halt the bulk deletion process
                                     $action->halt();
+
                                     return;
                                 }
                             }