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/logger/logger.go

@@ -35,23 +35,3 @@ func Init(cfg Config) error {
 
 	return nil
 }
-
-// Get returns the global logger
-func Get() *zerolog.Logger {
-	return &log.Logger
-}
-
-// WithFields returns a logger with additional fields
-func WithFields(fields map[string]interface{}) *zerolog.Logger {
-	logger := log.Logger
-	for k, v := range fields {
-		logger = logger.With().Interface(k, v).Logger()
-	}
-	return &logger
-}
-
-// WithRequestID returns a logger with request ID
-func WithRequestID(requestID string) *zerolog.Logger {
-	logger := log.With().Str("request_id", requestID).Logger()
-	return &logger
-}