enh: fsync WAL idx and log when walRollImpl

source/libs/wal/src/walWrite.c

@@ -387,20 +387,33 @@ END:
 
 int32_t walRollImpl(SWal *pWal) {
   int32_t code = 0;
+
   if (pWal->pIdxFile != NULL) {
+    code = taosFsyncFile(pWal->pIdxFile);
+    if (code != 0) {
+      terrno = TAOS_SYSTEM_ERROR(errno);
+      goto END;
+    }
     code = taosCloseFile(&pWal->pIdxFile);
     if (code != 0) {
       terrno = TAOS_SYSTEM_ERROR(errno);
       goto END;
     }
   }
+
   if (pWal->pLogFile != NULL) {
+    code = taosFsyncFile(pWal->pLogFile);
+    if (code != 0) {
+      terrno = TAOS_SYSTEM_ERROR(errno);
+      goto END;
+    }
     code = taosCloseFile(&pWal->pLogFile);
     if (code != 0) {
       terrno = TAOS_SYSTEM_ERROR(errno);
       goto END;
     }
   }
+
   TdFilePtr pIdxFile, pLogFile;
   // create new file
   int64_t newFileFirstVer = pWal->vers.lastVer + 1;