fix: persist account ownership for script templates and generations

backend/tests/test_script_templates.py

@@ -1,4 +1,6 @@
 """Integration tests for Script Template Editor permissions and share endpoint."""
+from uuid import UUID as PyUUID
+
 import pytest
 from httpx import AsyncClient
 from sqlalchemy import select
@@ -65,6 +67,9 @@ class TestScriptTemplatePermissions:
         data = resp.json()
         assert data["name"] == "Test Template"
         assert data["created_by"] is not None
+        result = await test_db.execute(select(ScriptTemplate).where(ScriptTemplate.id == PyUUID(data["id"])))
+        template = result.scalar_one()
+        assert template.account_id is not None
 
     @pytest.mark.asyncio
     async def test_engineer_can_edit_own_template(self, client, auth_headers, test_db):