The windows-amd64 runner has the base Windows SDK + MSVC + LLVM + Rust but NOT
the WDK (probed: km=False, no um/iddcx, no inf2cat/stampinf/devgen) or cargo-wdk,
so the all-Rust UMDF drivers can't build there yet. Adds an idempotent
provisioning script (scripts/ci/provision-windows-wdk.ps1: download wdksetup 26100
-> /q /norestart, cargo install --locked cargo-wdk, then verify km/wdf + iddcx
headers + inf2cat/stampinf + cargo-wdk) and a workflow_dispatch/push workflow that
runs it on the persistent runner (one-time; install persists).
cargo-wdk (not cargo-make) is windows-drivers-rs's current build+package tool
(cargo build -> stampinf/inf2cat/signtool). Driver builds must pin
Version_Number=10.0.26100.0 (the runner also has 10.0.28000.0, which lacks km/crt).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
