Adds [tool.ruff] and [tool.ty] config to pyproject.toml with a curated
ruff rule set (E, F, W, I, UP, B, C4, SIM, RUF, ASYNC, LOG, G, PIE, RET,
PERF, N), pins ruff/ty in requirements-dev.txt, reformats the whole tree
with `ruff format`, and fixes the pre-existing lint and type-check debt
those tools surfaced so both run clean.
Production-code type fixes include: HA's ConfigFlowResult vs. the
generic FlowResult in config_flow.py, narrowing BoundEntity.desc to its
platform-specific subclass (SelectDesc/NumberDesc/SensorDesc/etc.) via
cast() instead of an unchecked annotation, converting HA device_class
strings to their proper enum types, a resolve_registry callback typed
as `object` instead of `DeviceRegistry | None`, and a couple of other
narrow correctness fixes (CA key type validation, an index-out-of-bounds
false positive from an empty-tuple fallback, a bool/dict argument swap).
Test-file fixes are mechanical: narrowing SamsungEntityDescription to
the correct subclass via isinstance()/cast() before accessing
subclass-only fields, and asserting Optional write_fn/unit_fn fields
are set before calling them.
AWM-WW-AID-26-ONEBODY (washer+dryer combo) reports numofsubdevice='2' on
/multidevice/vs/0 but carries no /subdevices/vs/0 (no subdeviceIdList --
Pattern B's signal) and 4.04s /device/1 and /device/2 (Pattern A's). The
washer subdevice's UUID appears only as the path prefix of the
x.com.samsung.da.multidevice link in /oic/res; GET /<uuid>/device/0
answers the washer's own full Collection batch (model ..._WF80H vs the
master's ..._DV80H27H).
Treat every UUID path prefix seen in /oic/res as a prefixed-subdevice
candidate (minus ones subdeviceIdList already named), probed with the
same tolerated-404 seed RETRIEVE as Pattern B -- the shared body is
factored into _probe_prefixed. discover_partitioned's entity-level
liveness gate still decides materialization, so a UUID link with no live
sibling behind it contributes nothing.
Fixture is a live capture from the reporting board (serials/MACs/di
scrubbed); tests cover discovery, probe hygiene, washer-side entity
binding, and that the master's own entity set is unchanged.
Marc Billow