Set your merge queue checks timeout automatically

Set checks_timeout: auto on a queue and Mergify derives the timeout from that queue’s own recent CI runtimes (its 95th-percentile run time, plus a safety margin) — so you don’t have to guess a value, and a hung CI no longer sits in the queue indefinitely.

The merge queue’s batch side-peek now shows when a batch’s checks will time out, and the checks-timeout dequeue message states the exact budget that was exceeded (e.g. “the checks did not pass within the checks timeout of 45 minutes”).

This will be enabled by default on 2026-06-22.