remoteEventHandler's two switches become enumerable lookups keyed by
TrekWsTripEventName (bodies unchanged); WebSocketEvent.type derives
from the registry. wsEventPolicy.ts makes the client's non-reactions
explicit (HANDLED_OUTSIDE_TRIP_STORE + IGNORED_WS_EVENTS) and the
registry-parity test turns an unclassified server event into a red
test instead of silence. Zero behavior change.
jubnl