enh(sync) sync/mnode integration, syncStart async -> sync

source/libs/sync/src/syncAppendEntries.c

@@ -362,7 +362,9 @@ int32_t syncNodeOnAppendEntriesCb(SSyncNode* ths, SyncAppendEntries* pMsg) {
               // restore finish
               if (pEntry->index == ths->pLogStore->getLastIndex(ths->pLogStore)) {
                 if (ths->restoreFinish == false) {
-                  ths->pFsm->FpRestoreFinish(ths->pFsm);
+                  if (ths->pFsm->FpRestoreFinish != NULL) {
+                    ths->pFsm->FpRestoreFinish(ths->pFsm);
+                  }
                   ths->restoreFinish = true;
 
                   tsem_post(&ths->restoreSem);

source/libs/sync/src/syncCommit.c

@@ -139,7 +139,9 @@ void syncMaybeAdvanceCommitIndex(SSyncNode* pSyncNode) {
           // restore finish
           if (pEntry->index == pSyncNode->pLogStore->getLastIndex(pSyncNode->pLogStore)) {
             if (pSyncNode->restoreFinish == false) {
-              pSyncNode->pFsm->FpRestoreFinish(pSyncNode->pFsm);
+              if (pSyncNode->pFsm->FpRestoreFinish != NULL) {
+                pSyncNode->pFsm->FpRestoreFinish(pSyncNode->pFsm);
+              }
               pSyncNode->restoreFinish = true;
 
               tsem_post(&pSyncNode->restoreSem);

source/libs/sync/test/syncConfigChangeTest.cpp

@@ -73,12 +73,17 @@ int32_t GetSnapshotCb(struct SSyncFSM* pFsm, SSnapshot* pSnapshot) {
   return 0;
 }
 
+void FpRestoreFinishCb(struct SSyncFSM* pFsm) {
+  sTrace("==callback== ==FpRestoreFinishCb==");
+}
+
 SSyncFSM* createFsm() {
   SSyncFSM* pFsm = (SSyncFSM*)taosMemoryMalloc(sizeof(SSyncFSM));
   pFsm->FpCommitCb = CommitCb;
   pFsm->FpPreCommitCb = PreCommitCb;
   pFsm->FpRollBackCb = RollBackCb;
   pFsm->FpGetSnapshot = GetSnapshotCb;
+  pFsm->FpRestoreFinish = FpRestoreFinishCb;
   return pFsm;
 }