Encoding overhead remains inside the channel

The logical protocol applies to

Its target is the composite logical CPTP map. Physical carriers, elapsed time, workspace, classical records, readout errors, and fallback actions are reported separately; no operational overhead is silently removed.

Basis isometries preserve distances on their specified logical interfaces because they preserve trace norm and admit CPTP retractions. This does not remove physical encoding or decoding noise. En02-B's resource results concern its declared module class, not unrestricted decoder optimality CheungEn02B.