Potential fix for code scanning alert no. 47: Clear-text logging of sensitive information

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: eman

examples/energy_usage_example.py

@@ -112,7 +112,8 @@ def on_energy_usage(energy: EnergyUsageResponse):
             return
 
         device = devices[0]
-        print(f"✓ Device: {device.device_info.device_name} ({device.device_info.mac_address})")
+        # Avoid logging sensitive info such as MAC address.
+        print(f"✓ Device detected: {device.device_info.device_name}")
 
         # Connect to MQTT
         print("\nConnecting to MQTT...")