message: fix: filter items can be empty
diff: @@ -49,6 +49,9 @@ func ParseMetricQueryRangeParams(r *http.Request) (*model.QueryRangeParamsV2, *m
  // replace the variables in metrics builder filter item with actual value
  if postData.CompositeMetricQuery.QueryType == model.QUERY_BUILDER {
  for _, query := range postData.CompositeMetricQuery.BuilderQueries {
  + if query.TagFilters == nil || len(query.TagFilters.Items) == 0 {
  + continue
  + }
  for idx := range query.TagFilters.Items {
  item := &query.TagFilters.Items[idx]
  value := item.Value
  