47a request body: {"text":"Please quote for twelve desks."}
47a response body:
{
  "result": {
    "category": "purchase",
    "evidence": "Please quote for twelve desks."
  },
  "human_review_required": true
}
Changed text, expected/actual: purchase / return
47b diagnosis: input shape valid; baseline meaning is wrong.
HTTP transport and framework validation were not exercised here.
