No Access to Pro+ models

### Describe the bug

in github cli there are no pro+ models available despite paid subscription

### Affected version

_No response_

### Steps to reproduce the behavior

_No response_

### Expected behavior

_No response_

### Additional context

_No response_

Start by reproducing the missing Pro+ models in GitHub Copilot CLI with a paid subscription and document the account and model-selection conditions. Trace the CLI path responsible for available models; done means eligible Pro+ models are listed and selectable, with a regression test or clearly documented reproduction.

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