Prep for MS Teams plugin API (#25565)

* - columns added to ShareChannelRemotes: lastpostcreateat, lastpostupdateat
- SyncMsg and SyncResponse moved to `model` package
- field added to RemoteCluster struct: PluginID

* sync new posts before updated posts to ensure post order in MS Teams

* add plugid to remoteclusters table and store

* don't sync history by default

server/platform/services/sharedchannel/sync_send.go

@@ -21,11 +21,11 @@ type syncTask struct {
 	remoteID   string
 	AddedAt    time.Time
 	retryCount int
-	retryMsg   *syncMsg
+	retryMsg   *model.SyncMsg
 	schedule   time.Time
 }
 
-func newSyncTask(channelID string, remoteID string, retryMsg *syncMsg) syncTask {
+func newSyncTask(channelID string, remoteID string, retryMsg *model.SyncMsg) syncTask {
 	var retryID string
 	if retryMsg != nil {
 		retryID = retryMsg.Id
@@ -302,7 +302,7 @@ func (scs *Service) handlePostError(postId string, task syncTask, rc *model.Remo
 		return
 	}
 
-	syncMsg := newSyncMsg(task.channelID)
+	syncMsg := model.NewSyncMsg(task.channelID)
 	syncMsg.Posts = []*model.Post{post}
 
 	scs.addTask(newSyncTask(task.channelID, task.remoteID, syncMsg))
@@ -349,8 +349,10 @@ func (scs *Service) updateCursorForRemote(scrId string, rc *model.RemoteCluster,
 	scs.server.Log().Log(mlog.LvlSharedChannelServiceDebug, "updated cursor for remote",
 		mlog.String("remote_id", rc.RemoteId),
 		mlog.String("remote", rc.DisplayName),
+		mlog.Int("last_post_create_at", cursor.LastPostCreateAt),
+		mlog.String("last_post_create_id", cursor.LastPostCreateID),
 		mlog.Int("last_post_update_at", cursor.LastPostUpdateAt),
-		mlog.String("last_post_id", cursor.LastPostId),
+		mlog.String("last_post_update_id", cursor.LastPostUpdateID),
 	)
 }