- Added a startup INFO log on realtime LLM services that don't emit `UserStartedSpeakingFrame` / `UserStoppedSpeakingFrame` (Gemini Live, AWS Nova Sonic, Ultravox). The log spells out which downstream processors depend on those frames (RTVI client speech events, `TurnTrackingObserver`, `AudioBufferProcessor` turn recording, `UserIdleController`, user mute strategies, voicemail detector) and how to opt into local VAD when needed.