Reuse the existing CLI compilation policy in the exported binding acceptance
matrix. Own and clean a fresh cache per file while preserving caller cache
and coverage choices, all 92 cases, and every live CLI/MCP request and oracle.
Fixes#4079
Co-authored-by: Kaoru0822 <208281322+kaoru0822-kitauji@users.noreply.github.com>
Supply the system root and temporary directory in isolated Windows CLI environments, while preserving explicit caller overrides. Include captured command output in web acceptance exit-code failures so startup and codec errors remain diagnosable.