fix: code format
doc: update configuration docs
feat: auto respond in group with only 2 members
feat: normalize RPC query context and document gateway RPC API
Add voice attachment type and Telegram sendVoice support
Adjust heartbeat skill scaffold cleanup behavior
feat: add isolated context flag for cron tasks
feat: add xeno-voice skill and ElevenLabs voice script
docs: clarify Telegram user ID setup in README
feat: add weekly new-session system task