Function verify_registry 

pub fn verify_registry(
    cluster_id: &str,
    keys: &OperatorKeys,
    freezes: &[DescribedTopicFreeze],
) -> VerifyOutcome

Check every returned registry entry against the local trust set.

A live registry entry is a freeze, so the rebuilt bytes carry frozen set and no proposal. A thaw removes the entry, so no thaw is ever in the list this checks.