Function get_hardware_nodes_list 

pub async fn get_hardware_nodes_list(
    infra: &InfraContext<'_>,
    token: &str,
    params: &GetHardwareNodesListParams,
) -> Result<HardwareNodesListResult, Error>

Fetch hardware inventory for the nodes named by params.host_expression.

The expression is parsed by from_hosts_expression_to_xname_vec (hostlist notation, NIDs, or xnames; siblings are not expanded here). An empty resolution yields BadRequest rather than a silent no-op. The caller’s group access to every resolved xname is validated through validate_user_group_members_access before the per-node inventory fan-out runs.