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>

app/modules/cms/services/media_service.py

@@ -11,7 +11,6 @@ This module provides:
 
 import logging
 import mimetypes
-import os
 import shutil
 import uuid
 from datetime import UTC, datetime
@@ -22,11 +21,10 @@ from sqlalchemy import func, or_
 from sqlalchemy.orm import Session
 
 from app.modules.cms.exceptions import (
+    MediaFileTooLargeException,
     MediaNotFoundException,
-    MediaUploadException,
     MediaValidationException,
     UnsupportedMediaTypeException,
-    MediaFileTooLargeException,
 )
 from app.modules.cms.models import MediaFile