Correlation id of the request driving this call. Read by submit's outbox enqueue, which
stamps it onto the event envelope so the relay's logs can name the originating request;
every other consumer ignores it.
Optionalsignal
signal?:AbortSignal
Aborts the adapter's wait, not work already done: an adapter observes it on network and
database waits, and a caller treats an aborted call's effects as unknown, never as undone.
Correlation id of the request driving this call. Read by submit's outbox enqueue, which stamps it onto the event envelope so the relay's logs can name the originating request; every other consumer ignores it.