♻️ Refactor old CRUD utils and tests (#622)

src/backend/app/tests/conftest.py

@@ -2,7 +2,7 @@ from collections.abc import Generator
 
 import pytest
 from fastapi.testclient import TestClient
-from sqlalchemy.orm import Session
+from sqlmodel import Session
 
 from app.core.config import settings
 from app.db.engine import engine