Function get_nodes 

pub async fn get_nodes(
    infra: &InfraContext<'_>,
    token: &str,
    params: &GetNodesParams,
) -> Result<Vec<NodeDetails>, Error>

Fetch HSM node details for the targets named by params.host_expression.

The expression is parsed by crate::service::node_ops::from_user_hosts_expression_to_xname_vec; when params.include_siblings is set, the resulting xnames are expanded to cover every node on the same BMC. Access to the resolved set is validated before the (relatively slow) per-node detail fetch. The optional status_filter matches case-insensitively against either the power or configuration status. Results are sorted by xname for stable output.