CI never compiled Windows, the primary test bench (RAK4631 / COM12 /
USB serial). Add a windows job mirroring the existing platform jobs:
runs-on windows-latest, flutter-action stable, pub get, flutter build
windows --release --no-pub.
Advisory to start (not in branch-protection required checks); flip to
required after 5 green runs (#226). The first run validates the
windows-latest env against the local bench (C++ ATL, Developer Mode,
llamadart/vulkan, flserial); fixes applied per the #226 plan.
Part of #226.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>