Add wait event for rewind worker

Author: pashkinelfe

src/backend/utils/activity/wait_event.c

@@ -221,6 +221,9 @@ pgstat_get_wait_activity(WaitEventActivity w)
 		case WAIT_EVENT_BGWRITER_MAIN:
 			event_name = "BgWriterMain";
 			break;
+		case WAIT_EVENT_REWIND_WORKER_MAIN:
+			event_name = "RewindWorkerMain";
+			break;
 		case WAIT_EVENT_CHECKPOINTER_MAIN:
 			event_name = "CheckpointerMain";
 			break;

src/include/utils/wait_event.h

@@ -39,6 +39,7 @@ typedef enum
 	WAIT_EVENT_AUTOVACUUM_MAIN,
 	WAIT_EVENT_BGWRITER_HIBERNATE,
 	WAIT_EVENT_BGWRITER_MAIN,
+	WAIT_EVENT_REWIND_WORKER_MAIN,
 	WAIT_EVENT_CHECKPOINTER_MAIN,
 	WAIT_EVENT_LOGICAL_APPLY_MAIN,
 	WAIT_EVENT_LOGICAL_LAUNCHER_MAIN,