fix(antelop): route FCM pushes through SDK, per-flavor plist on iOS, unify applicationId

- Add AntelopAwareMessagingService so the Antelop SDK gets first dibs on every
  FCM push before delegating to firebase_messaging. Unblocks SCA wallet
  activation on Android, which was waiting forever for pushes that the
  FlutterFirebaseMessagingService was swallowing ever since Firebase was
  integrated. Remove the stock Antelop and firebase_messaging services via
  manifest-merge so only the wrapper handles MESSAGING_EVENT.
- Add Copy AntelopRelease Build Phase in Xcode to copy
  Runner/AntelopRelease-{flavor}.plist over the fixed AntelopRelease.plist
  inside the .app bundle based on CONFIGURATION. Without this the iOS SDK
  silently used the production plist on every flavor.
- Revert the six applicationId values (3 AndroidManifest + 3 AntelopRelease
  plist) to the sample id 4713640103500149457, which is the only one
  provisioned in Antelop's backend today. The four env+platform ids they
  provided all fail with 9999 / cryptography: Error while decrypting data.
  To be updated once Treezor confirms the real ids.
- Add packages/flutter_treezor_entrust_sdk_bridge/example as a pub workspace
  member and bump its Dart SDK and flutter_lints constraints so
  'melos bootstrap' stops failing with 'dependencies for
  flutter_treezor_entrust_sdk_bridge_example missing'.

pubspec.yaml

@@ -26,6 +26,7 @@ workspace:
   - modules/legacy/packages/legacy_shared
   - packages/design_system
   - packages/flutter_treezor_entrust_sdk_bridge
+  - packages/flutter_treezor_entrust_sdk_bridge/example
   - packages/fonts
   - packages/navigation
   - packages/payments