macos-13 (x64 runner) consistently stuck in queued state — GitHub provisioning issue. Switch both architectures to macos-14 (arm64): - osx-x64: cross-published via .NET (valid native x64 single-file) - osx-arm64: native build as before - x64 smoke test runs via Rosetta 2 (available on macos-14) - arm64 smoke test now uses --arch arm to test its own target