Function class_statuses 

pub fn class_statuses(
    lock: &SchemaRegistry,
    versions: &HashMap<String, AgentVersions>,
    deployed: &BTreeMap<String, Vec<String>>,
) -> Vec<ClassStatus>

Every recorded agent class’s status, in key order. versions is the check’s reconciled view (steps that hold, by class); deployed maps each Worker directory to its recorded environments.