- transcribe() now passes language="ko" (STT_LANGUAGE env, default ko): skips
Whisper auto-detect, fixing occasional Korean->Chinese mis-detection and
shaving latency. LLM is already locked via OUTPUT_LANGUAGE=Korean; MeloTTS is
Korean-only — so STT/LLM/TTS are all Korean now.
- converse_stream logs "⏱️ turn stt=.. think(LLM)=.. tts=.. total=.." so the
~30s voice-reply latency can be attributed to the real bottleneck stage.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>