fix: Allow msilib and nis modules to fail gracefully

[shivasurya]

Problem

The R2 upload workflow is failing with:

ERROR: Unexpected module failures: msilib, nis

Root Cause

The stdlib generator only allowed Windows-specific modules (msvcrt, nt, winreg, winsound, _winapi) to fail, but didn't include:

• msilib: Windows-only Microsoft Installer library
• nis: Unix Network Information Service (not available on all Linux systems, including GitHub Actions runners)

Solution

Add these modules to the platform-specific allowlist so they don't cause generation failures.

Testing

After merge, the workflow should complete successfully and upload to R2.

[safedep]

SafeDep Report Summary

No dependency changes detected. Nothing to scan.

_{This report is generated by SafeDep Github App}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.27%. Comparing base (9f531d7) to head (18e5c76).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #409   +/-   ##
=======================================
  Coverage   80.27%   80.27%           
=======================================
  Files          77       77           
  Lines        7763     7763           
=======================================
  Hits         6232     6232           
  Misses       1289     1289           
  Partials      242      242           

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