Both the /subdevices/vs/0 subdeviceIdList (Pattern B) and an /oic/res
link's UUID prefix (Pattern C) can name the same physical subdevice --
TP2X_FAC_BORA_21K, the Pattern B reporter's own board, does. Filtering
the two candidate lists against each other with a plain set difference
missed this when the two sources disagree on the UUID's case, letting
the same subdevice get probed and materialized twice under two
different keys.
Move the guard into _probe_prefixed itself, keyed on a
case-normalized id, so neither pattern can add a candidate the other
already claimed regardless of casing.
Marc Billow
e926905517