Icod.Terminal 1.0.0 — Windows PowerShell 5.1 Validation Compatibility

[uniblab]

Fixes the local build.cmd / Debug validation failure discovered after stable PR #34 merged.

Problems

packaging/VerifyLicenseHeaders.ps1 had two assumptions that were valid under PowerShell 7/.NET but not under Windows PowerShell 5.1:

1. it called [System.IO.Path]::GetRelativePath(...), which does not exist in the .NET Framework runtime used by powershell.exe;
2. it normalized file contents to LF before exact header comparison, but Windows PowerShell 5.1 constructs here-string templates with CRLF, causing a false header mismatch after the path issue was fixed.

The first failure was observed locally as:

Method invocation failed because [System.IO.Path] does not contain a method named 'GetRelativePath'.

The new Windows PowerShell 5.1 regression job then exposed the newline mismatch, allowing both compatibility defects to be fixed before publication.

Fix

• replaces all three Path.GetRelativePath calls with a repository-local Get-RepositoryRelativePath helper built from APIs available in Windows PowerShell 5.1;
• preserves repository-boundary validation and slash-normalized relative paths;
• normalizes generated expected header templates to LF before exact comparison, matching the existing normalization of repository file contents;
• does not alter license templates, project classification, stable API, package metadata, or runtime behavior.

Regression coverage

The Windows PR runtime job now explicitly runs:

shell: powershell
run: ./packaging/VerifyLicenseHeaders.ps1

before the existing PowerShell 7 runtime validation. This makes Windows PowerShell 5.1 compatibility an enforced PR contract rather than relying on pwsh-only hosted validation.

On exact head e49a8b72646551925310b0b0854f822e8e030a72, workflow #978 (34200260312) has already passed the explicit Verify license headers under Windows PowerShell 5.1 step. The remaining normal runtime/package jobs continue to validate the unchanged stable 1.0 package/API contracts.

This PR is a pre-publication build/validation compatibility fix for stable 1.0.0; it contains no product-source or API changes.