Request: Expose OutletInUse as contact sensor?
### Current Situation

I use some Kasa KP125 smart plugs attached to “always on” devices - for example, my dishwasher and washing machine. My use case is detecting when the appliance has finished a cycle and triggering an automation, for example a notification. This trigger is based on the property OutletInUse.

However, HomeKit doesn’t allow one to trigger automations based on this property - only if the smart plug is controlled (turned on or off).

The work around is to use the Eve or Home+ app, which allows users to trigger automations based on this property.

### Proposed Change

Optionally expose the OutletInUse property as a contact sensor to allow this property to trigger automations in HomeKit and ShortCuts.

This would negate the need to use a third party app. It would also automatically enable notifications on changes to Outlet In Use rather than if the plug is turned on or off.

#### Options

- For each device configuration, expose OutletInUse property as a contact sensor **in addition to** exposing outlet
- For each device configuration, **only** expose OutletInUse property as a contact sensor **instead of** exposing outlet
    - This would prevent device from being accidentally turned off