Community-diagnosed (issue #972, Kaihui-AMD): pyproject.toml pins
torch==2.8.0, but the rocm6.2 wheel index only ever published up to
2.5.1 — the reinstall silently failed to resolve and fell back to the
default CUDA build, which runs on CPU on an AMD GPU. The failure was
correctly logged (bootstrap.rs's emit_log warning), just never actioned
because the index itself couldn't succeed. rocm6.4 carries a matching
torch==2.8.0 build.
Docs updated with the corrected index plus a repo.radeon.com find-links
path for users who want a driver-matched ROCm 7.2.x build the PyTorch
index doesn't carry (OMNIVOICE_TORCH_INDEX only accepts a PEP 503 index,
not find-links, so that's documented as a manual step).
Co-authored-by: mergetest <test@local>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
