public static Cluster create(ClusterSpec.Id id, boolean exclusive, Capacity requested) {
        return new Cluster(id, exclusive,
                           requested.minResources(), requested.maxResources(), requested.groupSize(), requested.isRequired(),
                           requested.cloudAccount(), List.of(), Autoscaling.empty(), requested.clusterInfo(), BcpGroupInfo.empty(), List.of());
    }
Add or update (based on "at" time) a scaling event
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/applications/Cluster.java