Add f7push v0.1: FCM device registry and push API for F7cloud.

Portable occ-based config, OCS endpoints for APK registration, notification relay, and server-side push dispatch.

lib/App/NotificationRelay.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\F7Push\App;
+
+use OCA\F7Push\Service\ConfigService;
+use OCA\F7Push\Service\PushDispatcher;
+use OCP\Notification\IApp;
+use OCP\Notification\INotification;
+
+/**
+ * Relays F7cloud account notifications to registered mobile devices via Firebase.
+ * Does not store notifications (handled by the notifications app).
+ */
+class NotificationRelay implements IApp {
+	public function __construct(
+		private PushDispatcher $pushDispatcher,
+		private ConfigService $config,
+	) {
+	}
+
+	public function notify(INotification $notification): void {
+		if (!$this->config->isEnabled() || !$this->config->listenNotifications()) {
+			return;
+		}
+		$this->pushDispatcher->dispatchFromNotification($notification);
+	}
+
+	public function markProcessed(INotification $notification): void {
+	}
+
+	public function getCount(INotification $notification): int {
+		return 0;
+	}
+}