Candidate on 56639c99b: waiting gains launchable, and a message to a role
outside launch.instances gets a notice saying the launch is refused and a
talk line saying launch.by can't launch it. Mutants 8/8 killed; gate green
(bus, cli, business, webui and every scripts/test-*.sh).
Co-Authored-By: Claude Opus 5.5 <[email protected]>