curl --request GET \
  --url https://v2-nova-api.prod.czmx.in/org/{org_id}/calls/{call_id}/transcript

{
  "cost_usd": "<string>",
  "duration_seconds": 123,
  "ended_at": "<string>",
  "id": "<string>",
  "messages": [
    123
  ],
  "started_at": "<string>",
  "status": "<string>",
  "stt_duration_seconds": 123,
  "tokens_input": 123,
  "tokens_output": 123,
  "transcript_text": "<string>",
  "tts_characters": 123
}