in csrc/deep_ep.cpp [149:153]
pybind11::bytearray Buffer::get_local_nvshmem_unique_id() const {
EP_HOST_ASSERT(rdma_rank == 0 and "Only RDMA rank 0 can get NVSHMEM unique ID");
auto unique_id = internode::get_unique_id();
return {reinterpret_cast<const char*>(unique_id.data()), unique_id.size()};
}