Harden Apple Watch snapshot synchronization

crates/storage/tests/apple_mobile_audit.rs

@@ -62,8 +62,28 @@ fn apple_sources_preserve_the_mobile_security_boundary() {
     assert!(watch.contains("SecItemCopyMatching"));
     assert!(app.contains("session.sendMessage(payload"));
     assert!(app.contains("session.transferUserInfo(payload)"));
+    assert!(app.contains("session.outstandingUserInfoTransfers"));
+    assert!(
+        app.split_once("@main")
+            .expect("iPhone app delegate")
+            .0
+            .contains("UIApplication.didBecomeActiveNotification")
+    );
     assert!(watch.contains("didReceiveMessage message"));
     assert!(watch.contains("didReceiveUserInfo userInfo"));
+    assert!(watch.contains("session.outstandingUserInfoTransfers"));
+    assert!(watch.contains("session.transferUserInfo(acknowledgement)"));
+    assert!(
+        watch
+            .split_once("func sceneBecameActive()")
+            .expect("Watch foreground handler")
+            .1
+            .split_once("func sceneBecameInactive()")
+            .expect("Watch inactive handler")
+            .0
+            .contains("receivedApplicationContext")
+    );
+    assert!(watch.contains("applyAuthoritativeSnapshot"));
 }
 
 #[test]