add seconds to standing/sitting time

src/homeassistant/service.ts

@@ -82,6 +82,7 @@ export class HomeAssistantService extends BaseService<HomeAssistantClient> {
 			position: position.as_text(),
 			is_standing: position.as_boolean,
 			last_changed: position.last_changed.toReadable(true),
+			last_changed_seconds: position.last_changed.seconds,
 		};
 	}