handle
fun handleFcmDataForTests(context: Context, data: Map<String, String>, transportMessageId: String? = null)
Test / demo entrypoint exposing handleFcmInbound to the sample app and instrumented tests. Behaves identically to a real FCM-dispatched RemoteMessage arriving via SwanMessagingService.onMessageReceived: the template router resolves NotificationTemplate, the appropriate renderer fires, and the notification is posted.