refactor(agent-runner): use sandbox file model

tests/unit_tests/agent/test_result_normalizer.py

@@ -290,29 +290,6 @@ class TestNormalizeNonMessageResults:
         assert result is None
         assert app.logger.warnings
 
-    @pytest.mark.asyncio
-    async def test_invalid_artifact_created_payload_is_dropped(self):
-        """Invalid artifact.created payload returns None with a warning."""
-        app = FakeApplication()
-        normalizer = AgentResultNormalizer(app)
-        descriptor = make_descriptor()
-
-        result = await normalizer.normalize(
-            {
-                'type': 'artifact.created',
-                'data': {
-                    'artifact_id': 'artifact-1',
-                    'artifact_type': 'file',
-                    'content_base64': 'not base64',
-                },
-            },
-            descriptor,
-        )
-
-        assert result is None
-        assert app.logger.warnings
-
-
 class TestNormalizeInvalidResults:
     """Tests for handling invalid results."""