Icarus hotfix 3.0.21.155391 restores OFFENDER cave worms and loot fixes

Icarus has received hotfix version 3.0.21.155391-rel-DangerousHorizons, released as part of a weekend batch of fixes rather than waiting for the next scheduled update.

The main fix addresses OFFENDER, which was not spawning cave worms as intended. The hotfix also prevents double spawning of loot in some prebuilts and stops Prebuilt Complete from being called twice following the older flow.