* fix(ci): restore contents write and re-run auto-merge on push
* fix(ci): serialize auto-merge enable and ignore already-enabled
* fix(ci): emit ci / ci on the merge-queue branch
* fix(ci): enqueue merge queue as seahaven-bot
* fix(ci): re-arm auto-merge as seahaven-bot after failed enqueue
* fix(ci): drop queue-branch push trigger that cancelled merge_group ci