[ISSUE #9721] Fix TimerDequeueGetService thread not exiting after shutdown

- Add isRunningDequeue() check in checkDequeueLatch while loop
- Exit loop immediately when service is stopped to avoid thread blocking
- Ensure moveReadTime is not executed during shutdown process
- Improve system stability and reliability

store/src/main/java/org/apache/rocketmq/store/timer/TimerMessageStore.java

@@ -953,6 +953,11 @@ public class TimerMessageStore {
         }
         int checkNum = 0;
         while (true) {
+            if (!isRunningDequeue()) {
+                LOGGER.info("Not Running dequeue, skip checkDequeueLatch for delayedTime:{}", delayedTime);
+                break;
+            }
+            
             if (dequeuePutQueue.size() > 0
                 || !checkStateForGetMessages(AbstractStateService.WAITING)
                 || !checkStateForPutMessages(AbstractStateService.WAITING)) {