- Add /script command (run/schedule/unschedule/schedules/list)
- Add scheduler.add_script_job() with 'once HH:MM' one-shot support
- Subscribe to agents/scripts/execution and notify admins via XMPP
- Integrate LLMCoordinator (local acquire/release for Nexus)
- Update /help with script commands
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>