Get Verification Summary

Summary of cost verification status (estimated vs verified). Issue #632: Verified vs estimated cost tracking.

curl -X GET "https://loading/api/v1/super-admin/llm-cost/verification-summary"

null

{
  "detail": [
    {
      "loc": [
        "string"
      ],
      "msg": "string",
      "type": "string"
    }
  ]
}