fix: implement robust state barge-in transitions, fix safety reset duration check, and upgrade conversational behavior guidelines

feat: complete latency tracking, API retries, echo suppression, and session watchdog

fix: Full enterprise audit - 6 critical bugs fixed (UUID spam, LLM silent bug, tool call accumulation, type safety, default CallerProfile, emotion serialization)

feat(E3): Google Calendar Real-Time Booking via Groq Function Calling

feat: structured note-taking with JSON state extraction and incremental updates

fix: automatic bypass, continuous language switching, hindi default, and removed annoying fillers

feat: Bland.ai/Retell.ai grade — streaming LLM-to-TTS pipeline, echo prevention, language lock fix

deploy: flattened structure for Hugging Face