List conversation messages

curl --request GET \
  --url https://api.gennia.ai/public/api/v1/conversations/{conversationPublicId}/messages \
  --header 'X-Api-Key: <api-key>'

{
  "items": [
    {
      "content": "<string>",
      "conversationPublicId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "costOps": 123,
      "costUsd": 123,
      "model": "<string>",
      "publicId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "role": "<string>",
      "sentAt": "2023-11-07T05:31:56Z",
      "tokenUsage": {
        "inputTokens": 123,
        "outputTokens": 123,
        "totalTokens": 123
      }
    }
  ],
  "limit": 123,
  "page": 123,
  "total": 123,
  "totalPages": 123
}