C4: a licence's room is its weekly window alone (issue 1409)

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

modules/claude-licence-manager/module.json

@@ -186,13 +186,13 @@
     },
     "switch_auto": {
       "type": "boolean",
-      "description": "Whether the manager moves every consumer off a licence whose session or weekly usage reaches switch_at_pct, to the licence with the most room; off, it still raises its no-room and near-limit conditions.",
+      "description": "Whether the manager moves every consumer off a licence whose weekly usage reaches switch_at_pct, to the licence with the most room; off, it still raises its no-room and near-limit conditions.",
       "trusted": true,
       "default": true
     },
     "switch_at_pct": {
       "type": "number",
-      "description": "The session or weekly usage of a licence, in percent, at which its consumers are moved to the licence with the most room.",
+      "description": "The weekly usage of a licence, in percent, at which its consumers are moved to the licence with the most room.",
       "minimum": 1,
       "maximum": 100,
       "trusted": true,
@@ -200,7 +200,7 @@
     },
     "room_below_pct": {
       "type": "number",
-      "description": "What both the session and the weekly usage of a licence must be below, in percent, for it to be a target of a switch.",
+      "description": "What the weekly usage of a licence must be below, in percent, for it to be a target of a switch.",
       "minimum": 1,
       "maximum": 100,
       "trusted": true,
@@ -208,7 +208,7 @@
     },
     "warn_at_pct": {
       "type": "number",
-      "description": "The session or weekly usage of a licence with consumers, in percent, at which it is warned about once.",
+      "description": "The weekly usage of a licence with consumers, in percent, at which it is warned about once.",
       "minimum": 1,
       "maximum": 100,
       "trusted": true,