SD-M2d: operator-channel's decided kept 7 days, on the shared events stream

The lead's ruling of 12:5x: no record fixes 30 days; decided rides the shared events stream, 7 days, as on the bus today.

Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig

go/seats/operatorchannel/contract.go

@@ -37,7 +37,7 @@ func Events() []string {
 // Family is where the seat's events are kept.
 const (
 	Family           = "operator-channel.decided"
-	FamilyMaxAgeDays = 30
+	FamilyMaxAgeDays = 7
 )
 
 // SubjectDecided is where decided is published for one caller.

seats/operator-channel/seat.json

@@ -170,7 +170,7 @@
   ],
   "family": {
     "name": "operator-channel.decided",
-    "max-age-days": 30
+    "max-age-days": 7
   },
   "records": [
     {

ts/src/operator-channel.ts

@@ -22,7 +22,7 @@ export const events = {
   decided: "decided",
 } as const;
 
-export const family = { name: "operator-channel.decided", maxAgeDays: 30 } as const;
+export const family = { name: "operator-channel.decided", maxAgeDays: 7 } as const;
 
 export function decidedSubject(caller: string): string {
   return "mesh.seat.operator-channel.event.decided." + caller;