Prioritize worker pool shutdown (#3795)

Author: yycptt

common/tasks/fifo_scheduler.go

@@ -206,6 +206,12 @@ func (f *FIFOScheduler[T]) processTask(
 			return
 		}
 
+		select {
+		case <-shutdownCh:
+			return
+		default:
+		}
+
 		select {
 		case task := <-f.tasksChan:
 			f.executeTask(task)