List proposal views

curl --request GET \
  --url https://api.propal.io/v1/proposals/{id}/views \
  --header 'Authorization: Bearer <token>'

{
  "summary": {
    "total_views": 123,
    "first_viewed_at": "<string>",
    "last_viewed_at": "<string>",
    "average_scroll_depth": 123,
    "total_active_duration_seconds": 123
  },
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "started_at": "<string>",
      "ended_at": "<string>",
      "duration_seconds": 123,
      "scroll_depth": 123,
      "was_afk": true,
      "country": "<string>",
      "created_at": "<string>"
    }
  ],
  "pagination": {
    "has_more": true,
    "next_cursor": "<string>",
    "total_count": 123
  }
}