✅ FIX: Enable vehicle classification + proper state handling (unknown -> actual type)

⚡ CRITICAL: Enable GPU acceleration for YOLO inference (43s -> 2-3s on GPU)

⚡ OPTIMIZE: detector - 3x faster plate detection (single OCR, lightweight preprocessing)

Fix: Install missing packages (ultralytics, paddleocr, torchvision) in conda env - Detection now working

Fix: Optional imports and database connection timeout handling

update: latest changes to app.py and detector.py

refactor: modularize codebase with SQL validation, improved schema, and security measures