🎨 Format files with pre-commit and Ruff (#611)

src/backend/app/tests/utils/item.py

@@ -1,5 +1,3 @@
-from typing import Optional
-
 from sqlalchemy.orm import Session
 
 from app import crud, models
@@ -8,7 +6,7 @@ from app.tests.utils.user import create_random_user
 from app.tests.utils.utils import random_lower_string
 
 
-def create_random_item(db: Session, *, owner_id: Optional[int] = None) -> models.Item:
+def create_random_item(db: Session, *, owner_id: int | None = None) -> models.Item:
     if owner_id is None:
         user = create_random_user(db)
         owner_id = user.id