metrics

Per-source / per-provider historical run metrics

📄️ Foreign-id map sizes: `series_external_ids` counts grouped by provider, plus persisted MangaUpdates legacy → modern slug cache stats. Used by the admin 'ID Maps' page; no range/bucketing applies because these numbers are not time-series.

Foreign-id map sizes: `series_external_ids` counts grouped by provider,

Across-all-providers refresh summary.

Detailed refresh metrics for a single provider.

Review-queue depth-over-time + median time-to-decision for the window.

Across-all-sources summary over the requested window.

Detailed metrics for a single source: summary + per-bucket counts.