fix: zk add close to avoid zk block.

internal/rpc/msg/sync_msg.go

@@ -75,6 +75,7 @@ func (m *msgServer) PullMessageBySeqs(
 			minSeq, maxSeq, notificationMsgs, err := m.MsgDatabase.GetMsgBySeqs(ctx, req.UserID, seq.ConversationID, seqs)
 			if err != nil {
 				log.ZWarn(ctx, "GetMsgBySeqs error", err, "conversationID", seq.ConversationID, "seq", seq)
+
 				continue
 			}
 			var isEnd bool
@@ -86,6 +87,7 @@ func (m *msgServer) PullMessageBySeqs(
 			}
 			if len(notificationMsgs) == 0 {
 				log.ZWarn(ctx, "not have notificationMsgs", nil, "conversationID", seq.ConversationID, "seq", seq)
+
 				continue
 			}
 			resp.NotificationMsgs[seq.ConversationID] = &sdkws.PullMsgs{Msgs: notificationMsgs, IsEnd: isEnd}