Join-Path appended an absolute ResultPath to the repository path,
producing an invalid path and preventing the restricted-token test run.
Use Path.Combine to keep rooted paths intact while retaining repository-
relative paths. Clarify the script parameter help.
The offline process-boundary tests fail with the original expression in
both editions and pass in all four configurations with the fix. They do
not launch a process or modify privileges.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: AI Assistant <ai@example.com>
Raimund Andree