Function generate_unique_node_name_from_names

pub fn generate_unique_node_name_from_names(
    node_name: impl Into<String>,
    names: &mut HashSet<String>,
) -> String

Returns node_name if it is not already in names.

Otherwise, appends an incrementing -{counter} suffix until a unique name is found, then returns it. Logs a warning when a duplicate is detected.