WA8000T reports no oneUiVersion and used the 'WA' consumer-model
prefix, unmapped in _CONSUMER_PREFIX_TO_KEY (only WW/WD/WF/WV were
covered), so it fell into the unknown-device-type fallback.
Adding a bare 'WA' entry collided with the unrelated '_WAC_' (Window
Air Conditioner, issue #87) board-family token: some devices report
description == modelNum, so 'WAC' shows up as its own description
segment and 'WAC'[:2] == 'WA' matched the new washer prefix before the
more specific '_WAC_' modelNum check ever ran. Fixed by reordering
for_device_by_model() to check board-family modelNum tokens first and
the fuzzier 2-letter consumer-model-prefix scan only as a fallback,
rather than patching the prefix matching itself (an earlier attempt --
requiring a digit immediately after the prefix -- broke issue #79's
real DVE50A8800 case, which has no digit there either). Added a
regression test pinning the WAC/WA disambiguation directly.
Confirmed against the issue #106 diagnostics dump with zero unbound
hrefs.