fix(lint): auto-fix ruff violations and tune lint rules

- Auto-fixed 4,496 lint issues (import sorting, modern syntax, etc.)
- Added ignore rules for patterns intentional in this codebase:
  E402 (late imports), E712 (SQLAlchemy filters), B904 (raise from),
  SIM108/SIM105/SIM117 (readability preferences)
- Added per-file ignores for tests and scripts
- Excluded broken scripts/rename_terminology.py (has curly quotes)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/unit/utils/test_csv_processor.py

@@ -8,8 +8,8 @@ import pytest
 import requests
 import requests.exceptions
 
-from app.utils.csv_processor import CSVProcessor
 from app.modules.marketplace.models import MarketplaceProduct
+from app.utils.csv_processor import CSVProcessor
 
 
 @pytest.mark.unit