The GitHub Actions job "Tests (AMD)" on airflow.git/metrics-pool-histograms has 
succeeded.
Run started by GitHub user 1fanwang (triggered by 1fanwang).

Head commit for run:
6f4c30f6f19b54fa713cccf3c6306752209a7c65 / 1fanwang <[email protected]>
feat(metrics): emit pool slot histograms alongside existing gauges

On most backends, the existing `pool.open_slots`, `pool.queued_slots`, 
`pool.running_slots`, and `pool.starving_tasks` gauges are last-write-wins 
between scrapes — a pool-pressure spike that falls between two scheduler 
iterations shows up as a single value, with no way to see p50/p95/p99 
utilization.

Emit a matching `stats.timing` (the codebase's histogram-shape primitive) with 
a `.distribution` suffix at each existing gauge call site. Same value, same 
tags. Gauges stay so existing scrapers keep working.

Closes #66800

Signed-off-by: 1fanwang <[email protected]>

Report URL: https://github.com/apache/airflow/actions/runs/25748857794

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