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v1.50.94 — 2026-08-19

  • feat(reporting): mail heatmap on the Reporting page — 7×24 grid (weekday × hour) shows cluster-wide mail distribution as color-coded cells; great for spotting spam bursts, load peaks, and traffic patterns; time window selectable as 7/14/30 days; backend GET /cluster/mail-logs/stats/heatmap with per-node fan-out (1.50.94)