fix: 修改多个处理函数的返回类型为指针类型，以提高内存使用效率并避免不必要的拷贝

handler/health/health.go

@@ -10,9 +10,9 @@ func init() {
 	handler.RegisterHandler("health", health, constants.LEVEL_USER)
 }
 
-func health(msg model.Message) (reply model.Reply) {
+func health(msg model.Message) (reply *model.Reply) {
 	heathResult := ""
-	return model.Reply{
+	return &model.Reply{
 		ReplyMsg:       heathResult,
 		ReferOriginMsg: true,
 		FromMsg:        msg,