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>
jpmschweitzerandClaude Opus 4.8
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