curl --request GET \
  --url https://app.sendmux.ai/api/v1/mailbox/messages/query-changes \
  --header 'Authorization: Bearer <token>'

{
  "meta": {
    "request_id": "req_clxxxxxxxxxxxxxxxxxxxxxxxxx"
  },
  "data": {
    "old_query_state": "<string>",
    "new_query_state": "<string>",
    "has_more": true,
    "removed": [
      "<string>"
    ],
    "added": [
      {
        "id": "<string>",
        "index": 123
      }
    ],
    "total": 123
  }
}