A virtual SpeedClass could be overridden dynamically (boss state change)
and silently diverge from the cached speed entry. SpeedClass is now
non-virtual instance state: assigning it invalidates the cached entry,
applies the new bucket's think and move speeds (preserving the
active/passive mode), and serializes only when it differs from the
type's DefaultSpeedClass - so a runtime bucket change survives a save
while its (bucket-matching) speeds still elide. Works from [props too.
Overrides become: DefaultSpeedClass for a type's constant bucket,
SpeedClass assignment for state changes, GetSpeeds/GetMoveSpeeds to
bypass the table entirely - none of which can leave the cache stale.
SpeedClass deserializes before the speed fields (index 7; later indexes
shift by one - v23 was never released, schema regenerated).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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