refactor: reorganize struct fields, add new handlers and storage backends

- [x] Reorder struct fields across codebase for consistency
- [x] Add analytics event handlers and tests
- [x] Add authentication API key management handlers and tests
- [x] Add pre-warming control handlers and tests
- [x] Implement S3 storage backend with tests
- [x] Implement SMB/CIFS storage backend with tests
- [x] Add CDN middleware tests
- [x] Integrate analytics tracking into cache manager
- [x] Add S3 and SMB storage initialization in app setup
- [x] Add CDN caching to proxy handlers
- [x] Remove distributed locking (Redis lock manager)
- [x] Remove proxy common package and utilities
- [x] Remove standalone HTTP server package
- [x] Remove logger middleware
- [x] Simplify error handling utilities
- [x] Update config with S3 and SMB options
- [x] Update cache manager signature to include analytics

pkg/scanner/rescanner.go

@@ -11,11 +11,11 @@ import (
 
 // RescanWorker handles periodic re-scanning of cached packages
 type RescanWorker struct {
-	manager       *Manager
 	metadataStore metadata.MetadataStore
 	storage       storage.StorageBackend
-	interval      time.Duration
+	manager       *Manager
 	stopCh        chan struct{}
+	interval      time.Duration
 }
 
 // NewRescanWorker creates a new rescan worker