Milliseconds since the session started when speech stopped. This will correspond
to the end of audio sent to the model, and thus includes the
min_silence_duration_ms configured in the Session.
The unique ID of the server event.
The ID of the user message item that will be created.
The event type, must be input_audio_buffer.speech_stopped.
Returned in
server_vadmode when the server detects the end of speech in the audio buffer. The server will also send anconversation.item.createdevent with the user message item that is created from the audio buffer.