DisclosureLabelClient posts through a LabelTransport, so services on Spring Framework 6.0 can declare it — RestTemplateLabelTransport for Spring Boot 3.1 (most of the fleet, which has no RestClient), RestClientLabelTransport for 6.1; no signature of the client names RestClient, which failed the bean with NoClassDefFoundError (KamoCollab CP05 Task 25)