curl --request GET \
  --url https://app.msportal.ai/api/public/v1/surveys/{id}/stats \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "surveyId": "<string>",
    "totalInvites": 123,
    "completedResponses": 123,
    "responseRate": 123,
    "averageSentiment": 123,
    "questionStats": [
      {
        "questionId": "<string>",
        "questionText": "<string>",
        "answerType": "short_text",
        "responseCount": 123,
        "averageValue": 123,
        "optionCounts": {}
      }
    ]
  }
}