Allow TrainRatioTracker to see the same train again

src/calng/utils.py

@@ -447,7 +447,8 @@ class TrainRatioTracker:
         self._train_id_queue.clear()
 
     def update(self, train_id):
-        if self._train_id_queue and (last_seen := self._train_id_queue[-1]) >= train_id:
+        # allows same train ID multiple times
+        if self._train_id_queue and (last_seen := self._train_id_queue[-1]) > train_id:
             raise NonMonotonicTrainIdWarning(
                 "New train ID not greater than last train ID seen! "
                 f"New: {train_id}, previous: {last_seen}"