Optionaltranscriber_STT processing latency: stop talking to final transcript received.
Optionalturn_Additional wait after transcript for end-of-turn detection.
Optionalmodel_LLM latency: wait for first token after ready to prompt. Absent on preflight hit.
Optionalvoice_TTS engine latency: first text sent to TTS until first audio received.
OptionalpreflightEarly generation metrics.
Per-turn latency metrics (all values in milliseconds).