mg.RegisterRead(func(ctx context.Context) []MetricV2 {
		return getHistogramMetrics(httpRequestsDuration,
			getS3TTFBDistributionMD(), true, true)
	})
	return mg
}

func getTierMetrics() *MetricsGroupV2 {
	mg := &MetricsGroupV2{
		cacheInterval: 10 * time.Second,
	}
	mg.RegisterRead(func(ctx context.Context) []MetricV2 {
		return globalTierMetrics.Report()
	})
	return mg
}

		if mg, ok := matchingMG[collectorPath]; ok {
			var commonLabels []string
			for k := range mg.ExtraLabels {
				commonLabels = append(commonLabels, k)
			}
			for _, d := range mg.Descriptors {
				labels := slices.Clone(d.VariableLabels)
				labels = append(labels, commonLabels...)
				metric := metricDisplay{
					Name:   mg.MetricFQN(d.Name),
					Help:   d.Help,