v1.4.1

Fixed

• llm validation errors say what is wrong (SPEC §9.5). Since v1.4.0 any mistake in llm
  — an array of six models, an entry without model, even a single object without model —
  came back as 400 bad_request with a bare invalid body: llm Invalid input. The field is
  now parsed by shape, so the refusal names the field and the reason
  (invalid body: llm.1.model: …, llm: an llm array takes at most 5 models, got 6), and
  refusals about one entry of an array (allowlist, key, images) start with llm.<index>.