discover() flagged /cycleinterface/vs/0, /drlc/0, and /operational/state/0
as unbound on real washer dumps, which would surface a spurious device
coverage gap for washer owners. All three are noise: cycleinterface is
empty on every dump seen, drlc/0 is an OCF-native duplicate of the
already-ignored /drlc/vs/0, and operational/state/0 is a read-only
OCF-native duplicate of /operational/state/vs/0 (already modeled by the
richer, write-capable operational.OPERATIONAL_STATE).