Extract settings and harden geofence automation

test/geofence_automation_service_test.dart

@@ -85,6 +85,7 @@ void main() {
     expect(calls.single.method, 'armGeofence');
     expect(calls.single.arguments, <String, Object?>{
       'homeId': 'home-1',
+      'homeName': 'Home 1',
       'baseUrl': 'https://one.example',
       'apiKey': 'secret-key',
       'latitude': 55.75,