RealtimeServerEventResponseAudioDone

Returned when the model-generated audio is done. Also emitted when a Response
is interrupted, incomplete, or cancelled.

{
    "event_id": "string",
    "type": "response.audio.done",
    "response_id": "string",
    "item_id": "string",
    "output_index": 0,
    "content_index": 0
}