curl --request GET \
  --url https://api.thehaystack.ai/v2/haystack/items/{itemId}/transcript \
  --header 'Authorization: Bearer <token>'

{
  "itemId": 123,
  "title": "<string>",
  "transcript": "<string>",
  "chunks": [
    {
      "text": "<string>",
      "startMs": 123,
      "endMs": 123
    }
  ]
}