update fast intent

update chatbot

update prompt system for generate audio text

[NOTICKET] Remove threshold retriever

[NOTICKET] Tuning prompt generate audio text

Feat: Chat - add audio_text field for TTS, Document - delete, System Prompt Tuning

Feat: audio text streaming, document handler, db handler

feat: persist RAG sources to DB and return them in room detail

[NOTICKET] Demo agentic agent