LogiVoice parameters: _LogiVoiceParametersValidator extends
MultipleRangeValidator but Setting.read() calls validate_read(reply) —
which neither class defined — so every LogiVoice parameters setting
raised AttributeError on read. Add validate_read that wraps the
existing validate_read_item using the single-item shape, and key the
parsed dict by str(sub_item) so MultipleRangeControl.set_value can
find values via v[str(sub_item)] instead of falling back to controls'
current zero values.
Stale _absent cache: when a feature is cached absent from a prior
build but device.features now reports it present, the cache is stale.
Drop the entry and retry the probe instead of silently skipping with
a config-deletion hint — if the retry still returns None, the
existing branch at the end of the loop re-adds it to new_absent.
e77a330f2f