Stop notifications after removing a host (#3176)

* fix(notifications): stop pushes after host removal

Push tokens were persisted indefinitely with no relationship to app pairing state. Give registrations a 48-hour renewable lease so offline unpairing converges, and revoke immediately when the host is reachable.

* fix(notifications): make token revocation bounded and durable

packages/app/src/push-notifications/index.native.ts

@@ -0,0 +1,12 @@
+import { revokeSubscription, startSubscription } from "./internal/subscriptions";
+import type { RevokePushNotificationsInput, StartPushNotificationsInput } from "./internal/types";
+
+export function startPushNotifications(input: StartPushNotificationsInput): () => void {
+  return startSubscription(input);
+}
+
+export function revokePushNotifications(input: RevokePushNotificationsInput): Promise<void> {
+  return revokeSubscription(input).catch((error) => {
+    console.warn("[PushNotifications] Failed to remove local push subscription", error);
+  });
+}