test: require fresh raw data in production smoke

tools/test_go_native_prod_smoke.py

@@ -136,6 +136,39 @@ class GoNativeProdSmokeTest(unittest.TestCase):
         self.assertEqual(check.status, "fail")
         self.assertIn("online=false", check.message)
 
+    def test_parse_tdengine_utc_timestamp_as_aware_utc(self):
+        parsed = smoke.parse_tdengine_utc_timestamp("2026-07-01 17:36:02")
+
+        self.assertEqual(parsed, dt.datetime(2026, 7, 1, 17, 36, 2, tzinfo=dt.timezone.utc))
+
+    def test_total_check_fails_when_latest_sample_is_stale(self):
+        now = dt.datetime(2026, 7, 1, 18, 0, 0, tzinfo=dt.timezone.utc)
+
+        check = smoke.check_total(
+            "gb32960.raw",
+            {"total": 1, "items": [{"ts": "2026-07-01 17:00:00"}]},
+            minimum=1,
+            max_age_minutes=30,
+            now=now,
+        )
+
+        self.assertEqual(check.status, "fail")
+        self.assertIn("latest_age_minutes=60.0", check.message)
+
+    def test_total_check_passes_when_latest_sample_is_fresh(self):
+        now = dt.datetime(2026, 7, 1, 18, 0, 0, tzinfo=dt.timezone.utc)
+
+        check = smoke.check_total(
+            "gb32960.raw",
+            {"total": 1, "items": [{"ts": "2026-07-01 17:45:00"}]},
+            minimum=1,
+            max_age_minutes=30,
+            now=now,
+        )
+
+        self.assertEqual(check.status, "pass")
+        self.assertIn("latest_age_minutes=15.0", check.message)
+
 
 if __name__ == "__main__":
     unittest.main()