- Replace process(forever=True) with asyncio event loop in _SlixClient.start()
- Make send_xmpp_message() thread-safe via loop.call_soon_threadsafe()
- Remove wait=True from join_muc() (no longer supported in slixmpp 1.13)
- Silence empty retained MQTT capability messages in CapabilitiesRegistry
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
sylvain