feat(api): Add admin endpoints for deletion log
Phase 3 Complete - Backend API
New Admin Endpoints (/api/admin/):
- GET /deletion-log?limit=10
- Returns recent deletion logs with pagination
- Validation: limit 1-1000
- Response: { deletions, total, limit }
- GET /deletion-log/all
- Returns complete deletion history
- Response: { deletions, total }
- GET /deletion-log/stats
- Returns deletion statistics
- Includes formatted file sizes (B/KB/MB/GB)
- Response: { totalDeleted, totalImages, totalSize, lastCleanup }
Features:
- Comprehensive error handling
- Input validation
- Human-readable file size formatting
- Consistent JSON responses
Integration:
- admin.js router mounted at /api/admin
- Added to routes/index.js
Task completed: ✅ 3.6