Two fixes for issue #9 (WW90T634DHE washer):
- washer dosing selects: the four detergent/softener dosing selects read their
current value from `<Prefix>LevelCtrl_<code>` (un-padded, e.g. "3") but their
options from `Supported<Prefix>LevelCtrl_<hexpairs>` (zero-padded, e.g. "03").
HA's SelectEntity renders a select "unknown" whenever current_option is not in
options, so all four sat "unknown" (idle and running) even though every other
select worked -- which is why it was only those four. Normalize the current
value to the supported code with the same integer value so it matches an
option (and its translation); convert back to the device's native un-padded
format on write.
- diagnostics: pkg_version("smartthings-local") reads package metadata off disk
(listdir + open + read_text), tripping HA's event-loop blocking-call detector.
Offload it to the executor. Audited the rest of the package: config_flow's
socket/crypto and every coordinator DTLS call are already offloaded via
async_add_executor_job -- this was the only blocking call left on the loop.
Also documents air-conditioner support in the README (device table, capability
module list, platform list), missed when that support landed.
Updates the washer dosing tests to the corrected value/write format and adds a
current-option-is-a-valid-option regression; adds a diagnostics test asserting
the version lookup runs off the event loop.
Marc Billow
c0298d57d9