## Summary
- remove the two bundled node-pty PowerShell helper scripts before
Windows signing runs
- keep the Azure Trusted Signing flow unchanged for signable binaries
and libraries
- add a unit test covering the packaging cleanup helper

## Test plan
- npm run fmt
- npm run lint:fix
- npm run ts
- npm test

Generated with Claude Code
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Co-authored-by: Claude <noreply@anthropic.com>