Before anything, remove any code related to App Group containers from
tvOS target because they are not available. Include the beta receipt
override, it's broken for that reason.
In short:
- Store all Core Data containers locally. Do not use the App Group for
Core Data for consistency across platforms.
- Store logs in the App Group on iOS/macOS, but locally on tvOS (see
`urlForCaches`).
Then, rather than one container per model, merge models into:
- Local: Providers
- Remote: Profiles + Preferences (now in the same CloudKit container)
Reuse the remote model for backups too.
This change is safe because:
- Local profiles are stored via Network Extension in the keychain, not
Core Data
- Remote profiles are re-imported via CloudKit sync
- Providers are re-downloaded on first use
- Preferences are lost, but they are "cheap" data
- Profile backups are lost, but they were hidden anyway
