A verdict on an answer this gateway served: {"request_id", "verdict": "correct"|"incorrect"}, the request id
from the response’s ratchet.request_id (or its completion id). With incorrect, corrected (the right answer)
and the request’s messages (and the conditions and end user it carried) store a human-labelled training example,
unless a storage opt-out or the task’s pinning keeps it out; a correct verdict never stores anything. An API key
reaches its own requests only (any other request id is a 404); open where chat completions are.