Feature request: Add a last error message entity

[CitizenRacer]

The last_error time entity is super useful. I'd love to have a text field that goes with it that easily displays what the last error was. It'll make it much easier to start digging in on what to repair.

[XaF]

You can create that directly in Home Assistant. You can create a sensor that tracks an attribute of another sensor, in this case the last error message available as attribute of the last error sensor!

[XaF]

I believe something like:

template:
  - sensor:
      - name: qolsys_panel_last_error_desc
        state: "{{state_attr('sensor.qolsys_panel_last_error', 'desc')}}"

[CitizenRacer]

WHOA. I had no idea. THANK YOU. Perhaps add it to the docs?

[XaF]

I do need to write documentation about the available attributes of the entities at some point!