Get the cached AI triage verdict for a host.

A host that has never been triaged returns a record rather than a 404: not yet judged is a normal state for a host, not a missing resource. Its state is queued or running if the host is waiting for its first verdict, and none if nothing has judged it and nothing is pending.

Whenever the host is on the triage queue the response carries queue_position and queue_length, so a view can report progress without a second request. A host that already has a verdict and has been asked for again keeps its verdict and its state, and reports the position of the re-run beside them.