The AW06C7155EWAZ window air conditioner (modelNum
TP1X_DA_AC_WAC_01001_0000) reports no oneUiVersion and uses the '_WAC_'
(Window Air Conditioner) modelNum token instead of the '_RAC_'/'_PRAC_'
tokens already handled by for_device_by_model. Add a fallback rule for
that token, routing it to the existing airconditioner registry.
The device's resource surface (mode/convenient/wind/temperature/power/
filter/humidity) is already fully modeled by the airconditioner
capability set, so this is purely a detection-routing fix -- confirmed
against the issue #87 diagnostics dump with zero unbound hrefs.