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/health/health.go

@@ -21,25 +21,25 @@ const (
 
 // Check represents a single health check
 type Check struct {
+	Fn     func(context.Context) (Status, string) `json:"-"`
 	Name   string                                 `json:"name"`
 	Status Status                                 `json:"status"`
 	Error  string                                 `json:"error,omitempty"`
-	Fn     func(context.Context) (Status, string) `json:"-"`
 }
 
 // Response is the health check response
 type Response struct {
-	Success  bool        `json:"success"`
 	Data     *HealthData `json:"data,omitempty"`
 	Metadata *Metadata   `json:"metadata,omitempty"`
+	Success  bool        `json:"success"`
 }
 
 // HealthData contains health check data
 type HealthData struct {
+	Components map[string]*Component `json:"components"`
 	Status     Status                `json:"status"`
 	Version    string                `json:"version"`
 	Uptime     string                `json:"uptime"`
-	Components map[string]*Component `json:"components"`
 }
 
 // Component represents a system component
@@ -57,8 +57,8 @@ type Metadata struct {
 
 // Checker manages health checks
 type Checker struct {
-	checks    []*Check
 	startTime time.Time
+	checks    []*Check
 	mu        sync.RWMutex
 }