UniFi G4 Doorbell Pro PoE Error message
### Analysis

When I enable the doorbell messages feature on the child bridge settings (Homebridge UniFi Protect) for my "UniFi G4 Doorbell Pro PoE", the following error message pops up in the log every 20 seconds and the feature is not available in HomeKit as well.

[09/03/2025, 14:32:20] [homebridge-unifi-protect] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: Cannot read properties of undefined (reading 'LEAVE_PACKAGE_AT_DOOR.LEAVE PACKAGE AT DOOR'). See https://homebridge.io/w/JtMGR for more info.
[09/03/2025, 14:32:20] [homebridge-unifi-protect] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: Cannot read properties of undefined (reading 'DO_NOT_DISTURB.DO NOT DISTURB'). See https://homebridge.io/w/JtMGR for more info.
[09/03/2025, 14:32:20] [homebridge-unifi-protect] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: Cannot read properties of undefined (reading 'CUSTOM_MESSAGE.Paket bitte vor Haustür legen'). See https://homebridge.io/w/JtMGR for more info.

### Expected Behavior

No error message and availability of feature in Apple Home

### Steps To Reproduce

1. Go to the Homebridge UniFi Protect child bridge settings.
2. Select the doorbell device
3. check "enable the doorbell messages feature" 

### Logs

```markdown
[09/03/2025, 14:32:20] [homebridge-unifi-protect] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: Cannot read properties of undefined (reading 'LEAVE_PACKAGE_AT_DOOR.LEAVE PACKAGE AT DOOR'). See https://homebridge.io/w/JtMGR for more info.
[09/03/2025, 14:32:20] [homebridge-unifi-protect] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: Cannot read properties of undefined (reading 'DO_NOT_DISTURB.DO NOT DISTURB'). See https://homebridge.io/w/JtMGR for more info.
[09/03/2025, 14:32:20] [homebridge-unifi-protect] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: Cannot read properties of undefined (reading 'CUSTOM_MESSAGE.Paket bitte vor Haustür legen'). See https://homebridge.io/w/JtMGR for more info.
```

### Configuration

```json
-
```

### Environment

- OS: Debian GNU/Linux Bookworm (12) running on Raspberry Pi 5
Homebridge
v1.9.0
Homebridge UI
v4.71.2
Plugins
newest available version
Node.js
v22.14.0

### Process Supervisor

hb-service

### Additional Context

_No response_