refactor: always send response if it is requested by primary

flow/connectors/postgres/cdc.go

@@ -386,14 +386,12 @@ func PullCdcRecords[Items model.Items](
 	lastEmptyBatchPkmSentTime := time.Now()
 	for {
 		if pkmRequiresResponse {
-			if cdcRecordsStorage.IsEmpty() && int64(clientXLogPos) > req.ConsumedOffset.Load() &&
-				time.Since(lastEmptyBatchPkmSentTime) >= 1*time.Minute {
+			if cdcRecordsStorage.IsEmpty() && int64(clientXLogPos) > req.ConsumedOffset.Load() {
 				metadata := connmetadata.NewPostgresMetadataFromCatalog(logger, p.catalogPool)
 				if err := metadata.SetLastOffset(ctx, req.FlowJobName, int64(clientXLogPos)); err != nil {
 					return err
 				}
 				req.ConsumedOffset.Store(int64(clientXLogPos))
-				lastEmptyBatchPkmSentTime = time.Now()
 			}
 
 			if err := sendStandbyAfterReplLock("pkm-response"); err != nil {
@@ -503,7 +501,10 @@ func PullCdcRecords[Items model.Items](
 			if pkm.ServerWALEnd > clientXLogPos {
 				clientXLogPos = pkm.ServerWALEnd
 			}
-			pkmRequiresResponse = true
+			if pkm.ReplyRequested || time.Since(lastEmptyBatchPkmSentTime) >= 1*time.Minute {
+				pkmRequiresResponse = true
+				lastEmptyBatchPkmSentTime = time.Now()
+			}
 
 		case pglogrepl.XLogDataByteID:
 			xld, err := pglogrepl.ParseXLogData(msg.Data[1:])