0.9.3 — Eco/reduced state still blocked temperature writes (#73)

No breaking config changes.

Fixed

• WRONG_THERMOSTAT_GROUP_MODE when setting temperature on a room in
  eco/reduced state (climate.py). 0.5.1 fixed the case where a room was
  in AUTOMATIC (schedule) mode by dropping it to MANUAL before writing
  the setpoint, but the SHC independently rejects the same write whenever
  the room's low (eco/reduced) flag is set — e.g. triggered by an open
  window, or by underfloor heating cutting out. That branch only ran when
  an explicit hvac_mode was passed to set_temperature; a bare call (the
  common case — a script or automation just adjusting the setpoint) never
  cleared it. async_set_temperature now clears low itself first,
  independent of operationMode, whenever the device reports it.