message: fix: error rate as a percentage of total requests
diff: @@ -1222,8 +1222,8 @@ func (r *ClickHouseReader) GetServices(ctx context.Context, queryParams *model.G
  serviceItems[i].Num4XX = val
  }
  serviceItems[i].CallRate = float64(serviceItems[i].NumCalls) / float64(queryParams.Period)
  - serviceItems[i].FourXXRate = float64(serviceItems[i].Num4XX) / float64(queryParams.Period)
  - serviceItems[i].ErrorRate = float64(serviceItems[i].NumErrors) / float64(queryParams.Period)
  + serviceItems[i].FourXXRate = float64(serviceItems[i].Num4XX) / float64(serviceItems[i].NumCalls)
  + serviceItems[i].ErrorRate = float64(serviceItems[i].NumErrors) / float64(serviceItems[i].NumCalls)
  }
  return &serviceItems, nil
  