fix: Attempt to resolve issue with Ubuntu 24.04 segmentation fault

cognee/modules/users/methods/get_default_user.py

@@ -1,4 +1,4 @@
-from sqlalchemy.orm import joinedload
+from sqlalchemy.orm import selectinload
 from sqlalchemy.future import select
 from cognee.modules.users.models import User
 from cognee.infrastructure.databases.relational import get_relational_engine
@@ -11,7 +11,7 @@ async def get_default_user():
     async with db_engine.get_async_session() as session:
         query = (
             select(User)
-            .options(joinedload(User.groups))
+            .options(selectinload(User.groups))
             .where(User.email == "default_user@example.com")
         )