refactor: do some internal refactor.

source/libs/stream/src/stream.c

@@ -287,7 +287,8 @@ int32_t streamProcessDispatchRsp(SStreamTask* pTask, SStreamDispatchRsp* pRsp, i
 
   qDebug("s-task:%s output status is set to:%d", pTask->id.idStr, pTask->outputStatus);
 
-  // the input queue of the (down stream) task that receive the output data is full, so the TASK_INPUT_STATUS_BLOCKED is rsp
+  // the input queue of the (down stream) task that receive the output data is full,
+  // so the TASK_INPUT_STATUS_BLOCKED is rsp
   if (pRsp->inputStatus == TASK_INPUT_STATUS__BLOCKED) {
     pTask->msgInfo.blockingTs = taosGetTimestampMs(); // record the blocking start time
 

source/libs/stream/src/streamDispatch.c

@@ -321,7 +321,7 @@ int32_t streamDoDispatchScanHistoryFinishMsg(SStreamTask* pTask, const SStreamRe
   return 0;
 }
 
-int32_t doSendDispatchMsg(SStreamTask* pTask, const SStreamDispatchReq* pReq, int32_t vgId, SEpSet* pEpSet) {
+static int32_t doSendDispatchMsg(SStreamTask* pTask, const SStreamDispatchReq* pReq, int32_t vgId, SEpSet* pEpSet) {
   void*   buf = NULL;
   int32_t code = -1;
   SRpcMsg msg = {0};