GCP only offers Windows Server images, which lack winget. Rewrite
bootstrap-windows.ps1 to be winget-free (Chocolatey for git + VS Build Tools,
direct-from-Google for the Flutter SDK) and add a -SkipVS fast path — the
ConPTY soak only needs Flutter/Dart. Runs under Windows PowerShell 5.1. README
gains a self-contained GCP Cloud Shell runbook (create / reset-password / RDP /
stop / delete).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Verification tooling for the Windows freeze assessment (T-424).
provision-vm.sh stands up a Windows KVM guest (dry-run unless --go);
bootstrap-windows.ps1 installs Flutter + VS C++ Build Tools and checks out
the branch; soak-conpty.ps1 runs the pty suite in a fresh dart.exe per
iteration and measures the orphaned conhost/cmd count that survives each
exit (the leak signature), with a per-iteration timeout so a wedged test
can't stall the run. Verifies the ConPTY leak (#1-#4); the GPU/TDR
hypothesis (#5) needs passthrough/bare metal (README appendix).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzer
