chore: clean up codebase for production readiness

- Remove all console.log/debug statements from production code
- Add NODE_ENV checks for development-only logging
- Remove test scripts (test-feedback, test-image-security, test-backup-*, test-restore)
- Remove one-time fix scripts (fix-temp-photos, fix-migration-state, mark-migration-applied)
- Remove sensitive files (.env.backup, ADMIN_CREDENTIALS.txt)
- Update package.json to remove references to deleted scripts
- Replace console statements with logger utility in backend
- Secure error boundaries to not expose stack traces in production

This makes the codebase production-ready with no debug output or test scripts.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

frontend/src/services/photos.service.ts

@@ -14,6 +14,12 @@ export interface AdminPhoto {
   uploaded_at: string;
   view_count?: number;
   download_count?: number;
+  // Feedback fields
+  has_feedback?: boolean;
+  average_rating?: number;
+  comment_count?: number;
+  like_count?: number;
+  favorite_count?: number;
 }
 
 export interface PhotoFilters {