Adds optional `entityByTrait` to StateMachineManager.sendEvent /
enqueueEvent so guard evaluation reads per-trait scalar state (mutated
by `(set @entity.X)` effects across transitions). OrbitalServerRuntime
now builds entityByTrait from `traitFieldStates` on every event, so
runtime-path guards reading @entity.X resolve to prior step writes
even for [runtime] entities with no persistence row.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>