Add bounded realtime profile context for Discord realtime voice sessions.
Default to `IDENTITY.md`, `USER.md`, and `SOUL.md`; `voice.realtime.bootstrapContextFiles: []` disables the extra context.
Document the config/SDK surface and refresh generated metadata.
Co-authored-by: FullerStackDev <263060202+fuller-stack-dev@users.noreply.github.com>