Binyang Li 197d62c4b9 Add IPC domain rank detection (#824) ...

Expose the number of ranks in each GPU IPC domain through Bootstrap and
Python bindings, using NVML fabric information on CUDA when available
and falling back to host-local ranks otherwise.

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

2026-06-30 09:47:14 -07:00

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