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

src/backend/app/crud/crud_item.py

@@ -1,5 +1,3 @@
-from typing import List
-
 from fastapi.encoders import jsonable_encoder
 from sqlalchemy.orm import Session
 
@@ -21,7 +19,7 @@ class CRUDItem(CRUDBase[Item, ItemCreate, ItemUpdate]):
 
     def get_multi_by_owner(
         self, db: Session, *, owner_id: int, skip: int = 0, limit: int = 100
-    ) -> List[Item]:
+    ) -> list[Item]:
         return (
             db.query(self.model)
             .filter(Item.owner_id == owner_id)