[BUG] Regression - Azure Foundry auth failing since 2.0.70

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

The latest version of claude code fails to authenticate with Azure foundry it works in 2.0.62

What Should Happen?

claude should work

Error Messages/Logs

Invalid API key · Please run /login

Steps to Reproduce

1. Update to latest version 2.0.72
2. export keys for connecting to foundry
3. observe errors when trying to connect to claude
4. revert to 2.0.62
5. everything works fine

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.62

Claude Code Version

N/A

Platform

Other

Operating System

Ubuntu/Debian Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_