0.13.0 - the KVM shows up in Home Assistant

If you run Home Assistant, the KVM can now live there as an ordinary device. Turn MQTT on in Settings, point it at your broker, and it is discovered automatically - no YAML to write.
What you get:
- sensors for chip temperature, viewers, video mode, frame rate, codec, bitrate, uptime and free memory;
- sensors for whether HDMI has a signal, whether a USB target is attached, and whether the target has power;
- buttons for power, reset, force off, Wake-on-LAN and restarting the KVM itself;
- an availability topic, so the device shows as offline when it really is.
TLS is supported, either verified against the built-in certificate bundle or skipped for a self-signed broker.
It is off by default, and a device that never turns it on does not pay for it.
There is a security fix in the same release: while the default password is still in force, a session can now reach nothing but the login endpoints. That rule used to be enforced by the console alone, which is the wrong place for it.