Get all messages in an iteration chain

curl --request GET \
  --url http://localhost:3001/api/v1/messages/iterations/{id} \
  --header 'x-api-key: <api-key>'

{
  "statusCode": 400,
  "message": "Validation failed",
  "errors": [
    {
      "code": "invalid_type",
      "message": "Expected string, received number",
      "path": [
        "email"
      ]
    }
  ]
}