Dashboard Baseline — last 7 days

Owner-only custom events emitted by DashboardTelemetry and EventsExportModal. Filter: event_data.masemit_owner = true.

dashboard_glance p50
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dashboard_glance p95
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dashboard_glance samples
0
dashboard_export_action mean
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dashboard_export_action count
0

Story 5.1 — delete this route once the baseline is frozen in docs/baselines/dashboard-baseline-2026-04.md.