SEC-06: GetUploadStatus now verifies that the authenticated user owns the upload before returning status. Returns 404 for non-owners to prevent information disclosure.
- Added GetUploadStats method in TrackUploadService to calculate statistics from tracks table - Standardized GetUploadStats handler to use RespondSuccess/RespondWithAppError - Replaced c.Get with GetUserIDUUID helper - Handler retrieves statistics: total_uploads, total_size, audio_files, image_files, video_files - Updated UploadHandler to include TrackUploadService dependency - Updated router to pass TrackUploadService to UploadHandler Phase: PHASE-2 Priority: P2 Progress: 39/267 (14.6%)