Windows: flip default to Ninja, add MSVC classifier, add GPU classifiers #490

Job	Run time
Start gate (abort window)	2s
C++ Tests Ubuntu Latest x86_64	6m 3s
Code style (spotless) + package graph	1m 17s
Test (vmlens interleavings)	1m 10s
Build WebUI assets (shared)	1m 24s
Cross-Compile Android aarch64 (OpenCL/Adreno)	2m 21s
Build and Test macOS 15 arm64 (no Metal)	2m 3s
Build and Test Linux aarch64	2m 17s
Cross-Compile manylinux2014 x86_64	1m 51s
Cross-Compile manylinux_2_28 x86_64 (CUDA)	16m 46s
Build and Test macOS 14 arm64 (Metal)	2m 20s
Cross-Compile Android aarch64	1m 54s
Build Windows 2025 x86_64 CUDA (Ninja + sccache)	1h 54m 26s
Build and Test Windows 2025 x86 (MSVC / VS 2026, classifier)	16m 7s
Build and Test Windows 2025 x86_64 (MSVC / VS 2026, classifier)	16m 17s
Build and Test Windows 2025 x86_64 (Ninja Multi-Config + sccache, default)	3m 10s
Build and Test macOS 15 arm64 (Metal)	2m 25s
Build Windows 2025 x86_64 Vulkan (Ninja + sccache)	5m 44s
Build Windows 2025 x86_64 OpenCL (Ninja + sccache)	3m 32s
Build and Test Windows 2025 x86 (Ninja Multi-Config + sccache, default)	4m 7s
Java Tests Ubuntu Latest x86_64	14m 36s
Java Tests macOS 15 arm64 (no Metal)	23m 32s
Java Tests macOS 14 arm64 (Metal)	17m 17s
Java Tests macOS 15 arm64 (Metal)	29m 51s
Java Tests Windows 2025 x86_64 (default / Ninja)	16m 40s
Java Tests Windows 2025 x86_64 (MSVC classifier)	16m 18s
Package JARs	2m 16s
Report	1m 2s
Check: v* tag	-1s
Publish Release to Central	-1s
Publish Snapshot to Central	-1s
Check: main branch / SNAPSHOT	-1s
Attach Signed Binaries to GitHub Release	0s
Update Snapshot Pre-release on GitHub	0s
	5h 26m 44s

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