Strategy used when raw session bursts exceed MaxClusters in 'auto' mode:
'adaptive-era': Automatically switches to calendar era buckets (year / quarter / month) when raw bursts
exceed EraZoomThreshold across multiple months/years, enabling click-to-zoom drill-down.
'merge-closest': Iteratively merges the two chronologically closest adjacent bursts until at most MaxClusters remain.
Strategy used when raw session bursts exceed
MaxClustersin'auto'mode:'adaptive-era': Automatically switches to calendar era buckets (year/quarter/month) when raw bursts exceedEraZoomThresholdacross multiple months/years, enabling click-to-zoom drill-down.'merge-closest': Iteratively merges the two chronologically closest adjacent bursts until at mostMaxClustersremain.