EntityPack.Boss (key 21) carries Entity.IsBoss through save and Continue. GenerateZone adds one boss
per BossZones entry before the ambient return, flying the faction's BossHull or, with the gap logged,
its most expensive available ship hull. RunGoal (ServerShared) is the one owner of boss life and exit
state, derived from Zone.Entities.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
