[Bug] "Device is already configured" should be "Service …"

### Short summary 📝

Leftover reference to "device"

### Detailed description 📋

The message

    "already_configured": "Device is already configured"

should be "Service …" by now as the integration creates services, no more "devices".

### Version 📌

0.2.3-beta

### Environment 🌐

_No response_

### Logs and screenshots 📂

_No response_