Ontario answer evaluation corpus JSON

Example response

{
  "evaluations": [
    {
      "confidence": "source-backed",
      "eval_id": "ontario.eval.x402-verifier",
      "expected_claim_id": "ontario.claim.x402-verifier",
      "expected_digest": "sha256:...",
      "html_selector": "#citation-receipt",
      "schema": "ontario.geo_eval_case.v1"
    }
  ],
  "schema": "ontario.geo_eval_corpus.v1"
}