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feat(perf): cover pipeline throughput (cpm) in performance probe (#945)

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* feat(perf): cover pipeline throughput (cpm) in performance probe

Mirror the analysis pipeline's tpm for covers. A new coverPerfStore samples the
backfill `done` progress from cover:library-progress events and derives a rolling
one-minute covers-per-minute rate. Surfaced as a live diag in perfLiveStore, a
pinnable "Cover backfill" throughput card in the Monitor tab, and a cpm row in
the Cover pipeline overlay block.

* docs(changelog): note cover pipeline cpm metric (PR #945)

Add CHANGELOG entry and credits line for the cover-pipeline covers-per-minute
throughput metric in the Performance Probe.
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cucadmuh
2026-06-02 11:05:28 +03:00
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CHANGELOG.md
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@@ -367,6 +367,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
* **Performance Probe** gains a runtime cover-thread control (`library_cover_backfill_set_parallel`) that resizes the HTTP/encode pools live; "Run full pass now" forces a pass and clears fetch-failed backoff.
* Clearing the active server's cover cache re-arms the idle gate and wakes the worker, and in-pass progress is emitted on a ticker so the offline & cache view keeps counting through the whole scan.
### Performance Probe — cover pipeline throughput (cpm)
**By [@cucadmuh](https://github.com/cucadmuh), PR [#945](https://github.com/Psychotoxical/psysonic/pull/945)**
* The cover pipeline now reports a covers-per-minute throughput (cpm), the analogue of the analysis pipeline's tpm: a rolling one-minute rate derived from the backfill `done` progress. Shown in the Monitor tab "Cover backfill" card (pinnable to the overlay) and in the Cover pipeline overlay block.