curl --request GET \
  --url https://api.callin.io/api/public/v1/knowledge-base/documents/{documentId} \
  --header 'x-api-key: <api-key>'

{
  "success": true,
  "data": {
    "documentId": "<string>",
    "type": "url",
    "name": "<string>",
    "details": {
      "url": "<string>"
    },
    "metadata": {
      "createdAt": "2023-11-07T05:31:56Z",
      "createdBy": {
        "userId": "<string>",
        "userEmail": "<string>"
      }
    }
  }
}