A GM flipping Movable (or Visible) back on for a long-frozen item registered
it with a deadline computed from its stale LastMoved, so the scheduler
deleted it on the next tick. The old save-time decay sweep had the same
semantics but hid them behind the save cadence.
Introduce DecayResetTime (CompactInfo-backed, persisted as delta minutes
under a new SaveFlag with an Item version bump): the decay countdown now
runs from the later of LastMoved and DecayResetTime. RestartDecay() stamps
it only when the item can decay and the stamp extends the deadline, so hot
paths with a fresh LastMoved allocate nothing.
- Movable/Visible/Spawner setters restart the countdown instead of
registering a stale deadline
- The region-refusal retry in DecayScheduler restarts the countdown without
rewriting LastMoved, which is reserved for actual moves
- A raw Map assignment (e.g. props) now counts as a move: it stamps
LastMoved and enrolls/withdraws the item, closing the gap where an item
moved out of Map.Internal via the setter never decayed
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
107ca3c1c0