fix to interoperability endpoint

app/shared/business_logic.py

@@ -10,7 +10,16 @@ from app.shared.db import worker_crud
 def get_store_archive_until(db: Session, group_id: str) -> datetime.datetime:
     group = worker_crud.get_group(db, group_id)
     assert group, f"Group {group_id} not found."
+    assert group.permissions and type(group.permissions) == dict, f"Group {group_id} has no permissions."
+
     max_lifespan = group.permissions.get("max_archive_lifespan_months", -1)
     if max_lifespan == -1: return None
 
     return datetime.datetime.now() + datetime.timedelta(days=30 * max_lifespan)
+
+
+def get_store_archive_until_or_never(db: Session, group_id: str) -> datetime.datetime:
+    try:
+        return get_store_archive_until(db, group_id)
+    except AssertionError as e:
+        return None