The vendor retired the session limit and answers the session window empty, so Room required a percentage that never
comes: live, no licence had room and no switch could choose a target. Room is now 100 less the weekly percentage; the
session window takes no part in the switch threshold, a target's bound, the near-limit warning or no-room's words.
A reading with no weekly percentage still has unknown room. The settings' descriptions and the README say so.
The whole tests' vendor answers the session window empty, as it does live; on the old rule they failed with the live
symptom ("has no session or weekly window in its reading").
Builds: design 39 bus-and-switch C4