Three comments this repair touches were still loose: "never rebuilt on a state
poll" (the discovery table, not the watchdog — the sensor's own poll does
refresh it when it has no fresh answer), and the class docstring's "recorded as
unknown" now says where a reader actually sees it, since the sensor reports
not_connected while the transport is down and unknown once it is up but the
sweep delivered nothing.
engineer
afc3326fc3
