Zone.Release is the one adder, StepFloatingItems and TryPickUp the only removers; DropLoot runs from the one
death subscription before the entity leaves the zone. Three C# default settings. Unity's drop path is untouched
(loot-1-present deletes it). Not yet built or run at this commit.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>