Describe the bug

Neither APNSClient nor APNSResponse are Sendable, which means we can't call sendAlertNotification and friends from an actor-isolated context

To Reproduce
Steps to reproduce the behavior:

1. Create an actor
2. Give it an APNSClient
3. Attempt to call sendAlertNotification from an isolated context

Expected behavior
It should work just fine since APNSResponse is just two UUIDs

Screenshots

Platform:

• OS: macOS
• Version 15.4

Additional context