Make upsert event payload readable in cli (#797)

Author: feedmeapples

tools/cli/util.go

@@ -371,6 +371,9 @@ func getEventAttributes(e *historypb.HistoryEvent) interface{} {
 	case enumspb.EVENT_TYPE_WORKFLOW_EXECUTION_FAILED:
 		data = e.GetWorkflowExecutionFailedEventAttributes()
 
+	case enumspb.EVENT_TYPE_WORKFLOW_TASK_FAILED:
+		data = e.GetWorkflowTaskFailedEventAttributes()
+
 	case enumspb.EVENT_TYPE_WORKFLOW_EXECUTION_TIMED_OUT:
 		data = e.GetWorkflowExecutionTimedOutEventAttributes()