critical: enable chromium cleanup to prevent memory leak

REMOVED: DISABLE_AUTO_CLEANUP=true from docker-compose.dev.yml
- This was causing 280+ chromium processes to accumulate
- System was heading toward crash due to memory exhaustion
- Cleanup will now run after each analysis cycle
- Critical for 24/7 operation stability

docker-compose.dev.yml

@@ -30,8 +30,6 @@ services:
       - SCREENSHOT_PARALLEL_SESSIONS=false
       - SCREENSHOT_MAX_WORKERS=1
       - BROWSER_POOL_SIZE=1
-      # Disable aggressive cleanup during development
-      - DISABLE_AUTO_CLEANUP=true
     
     # Load environment variables from .env file
     env_file: