Josh Knapp 0bcd8e8d21 Configure uv to always use PyTorch CUDA index ...

Changes:
- Set PyTorch CUDA index (cu121) as default for all builds
- CUDA builds support both GPU and CPU (auto-fallback)
- Fixes uv run reinstalling CPU-only PyTorch
- Updated dependency-groups syntax (fixes deprecation warning)

Benefits:
- Simpler build process - no CPU vs CUDA distinction needed
- uv sync and uv run now get CUDA-enabled PyTorch automatically
- Builds work on systems with or without NVIDIA GPUs
- Fixes issue where uv run check_cuda.py was getting CPU version

Index: https://download.pytorch.org/whl/cu121 (PyTorch 2.5.1+cu121)

2025-12-26 12:08:42 -08:00

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