* ci: sync the weekly release cycle with Linear releases
* tmp: dry-run trigger
* tmp: backfill 1.105.0 from the rc/1.104.0 cut
* ci: drop the temporary branch trigger used to verify the Linear sync
* ci: fail on a broken rc-branch lookup and never move a just-cut release back to main
* tmp: dry-run trigger
* ci: drop the temporary branch trigger again
