ci: re-pin PR Hygiene so its runs queue instead of cancelling

[shumkov]

Re-pins the shared review workflow onto dashpay/stale_prs_are_bad#26 and #27.

Runs queue instead of cancelling. A concurrency group holds one pending run and cancels it when the next event arrives, so three events on one pull request inside a run's duration cancelled the middle one — and a cancelled run renders as a failed check. That was 1494 of 6556 runs over five days, and it is why pull requests have been going red. concurrency.queue: max lets them wait in arrival order instead; nothing is cancelled, and runs for one pull request stay serialised.

One duplicated comment no longer freezes an author's queue. Two runs reconciling the same pull request at once could each open a controller state comment, after which every later run refused to read that pull request's history — and the handler for that refusal puts an error status on every open pull request of that author. Hourly, until someone deleted a comment by hand. The oldest record now wins; nothing is deleted.

Also: a refused label or reviewer request is reported and skipped rather than aborting the run.

Verified on dash-evo-tool before this round: concurrency.queue is accepted in a called workflow and the run succeeds.

No change to who may approve, when a pull request is ready, or what blocks it. The only line that differs here is the pinned engine revision.

🤖 Generated with Claude Code

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