feat: stabilize cold display runtime deployment

tests/test_cli.py

@@ -51,8 +51,9 @@ class CliTests(unittest.TestCase):
         events = [json.loads(line) for line in output.getvalue().splitlines()]
         self.assertEqual(
             [event["event"] for event in events],
-            ["batch_started", "batch_pending_disposal", "batch_discarded"],
+            ["batch_started", "time_alarm", "batch_pending_disposal", "batch_discarded"],
         )
+        self.assertEqual(events[1]["severity"], "alarm")
 
 
 if __name__ == "__main__":