# Tasks: Add Backend Reliability Improvements

## 1. Database Connection Pool
- [x] 1.1 Add pool_size=10 configuration
- [x] 1.2 Add max_overflow=20 configuration
- [x] 1.3 Add pool_timeout=30 configuration
- [x] 1.4 Add environment variable overrides for pool settings
- [x] 1.5 Log connection pool statistics periodically

## 2. Redis Fallback Mechanism
- [x] 2.1 Create in-memory queue for failed Redis publishes
- [x] 2.2 Implement background retry for queued messages
- [x] 2.3 Add max queue size limit to prevent memory issues
- [x] 2.4 Log Redis failures and recovery events

## 3. Blocker Deletion Check
- [x] 3.1 Add check for unresolved blockers before task deletion
- [x] 3.2 Return warning response with blocker count
- [x] 3.3 Add force_delete parameter to bypass check
- [x] 3.4 Auto-resolve blockers when force deleting

## 4. NAS Storage Validation
- [x] 4.1 Validate UPLOAD_DIR path exists on startup
- [x] 4.2 Check write permissions on storage directory
- [x] 4.3 Log warning if using local storage instead of NAS
- [x] 4.4 Add health check endpoint for storage status

## 5. Testing
- [x] 5.1 Test under connection pool exhaustion
- [x] 5.2 Test Redis disconnect and recovery
- [x] 5.3 Test blocker deletion scenarios