Ironchip_authenticator

- iOS: migrated to the UIScene life cycle (`AppDelegate` with the implicit Flutter engine and a `SceneDelegate`), which is required by the iOS 27 SDK; apps built with Xcode 27 without it fail to launch - iOS: `shared_preferences_foundation` is pinned to 2.5.7, since 2.6.0 requires `objective_c` ^9.6 while the vendored copy is 9.5 and the build failed to compile - The local notifications plugin is now initialized before checking whether the app was launched by a notification tap, so a tap that opens the app from a killed state is not missed - Long Crashlytics log messages are split into numbered chunks, because Crashlytics truncates each line at 1024 bytes