Pro users restricted from Claude models on CLI (v1.0.27 / Debian)

### Describe the bug

### Description:

I am a GitHub Copilot Pro subscriber (annual billing). Despite my plan including access to premium models, I am currently unable to select Claude 4.6 (or earlier Claude versions) in the Copilot CLI. The interface lists these models under an "Upgrade" category, effectively locking me out of features I have already paid for.

### Environment:

- OS: Linux Debian
- CLI Version: 1.0.27
- Subscription Tier: Pro

### Steps Taken:

- Completed the CLI authentication process multiple times.
- Verified active Pro subscription status on my GitHub account.
- This issue has persisted for over two months, despite multiple attempts to re-login within the CLI.

### Expected Behavior:

Claude models should be available and selectable for all Pro subscribers without an "Upgrade" category.

### Actual Behavior:

The CLI fails to recognize my Pro entitlement for Claude models. There are no error messages; the models are simply treated as locked content. This appears to be a systemic sync issue affecting early annual subscribers.

### Screenshots:

### Affected version

_No response_

### Steps to reproduce the behavior

_No response_

### Expected behavior

_No response_

### Additional context

_No response_

リポジトリのファイル、テスト、コードのエントリポイントは特定されていません。まず、検証済みの Pro アカウントを使用して Debian 上で CLI 1.0.27 によるモデル一覧を再現し、次に CLI が Claude モデルへのアクセスをどのように認識しているかを追跡してください。Pro ユーザーが「Upgrade」カテゴリなしでモデルを選択できれば完了です。

索引モデルが issue の本文から書いたものです。