SD-M2b: mesh-broker's events on the shared events stream, 7 days

The lead's ruling of 13:0x replaces 12:5x's said-subject: mesh-broker's events follow every seat, on
mesh.seat.mesh-broker.event.<event> in the shared events stream, 7 days; the bus module keeps a longer history on a
stream of its own module. So every seat family is that stream filtered to the seat's subjects: a definition says 7
days and no cap of its own, and the reader refuses anything else.

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

seats/mesh-broker/fixtures/events.json

@@ -2,7 +2,7 @@
   {
     "name": "created on the seat's subject",
     "of": "event:created",
-    "subject": "mesh.seat.mesh-broker.said.created",
+    "subject": "mesh.seat.mesh-broker.event.created",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",
@@ -25,7 +25,7 @@
   {
     "name": "refused on the seat's subject",
     "of": "event:refused",
-    "subject": "mesh.seat.mesh-broker.said.refused",
+    "subject": "mesh.seat.mesh-broker.event.refused",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",
@@ -49,7 +49,7 @@
   {
     "name": "drifted on the seat's subject",
     "of": "event:drifted",
-    "subject": "mesh.seat.mesh-broker.said.drifted",
+    "subject": "mesh.seat.mesh-broker.event.drifted",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",
@@ -73,7 +73,7 @@
   {
     "name": "drift-cleared on the seat's subject",
     "of": "event:drift-cleared",
-    "subject": "mesh.seat.mesh-broker.said.drift-cleared",
+    "subject": "mesh.seat.mesh-broker.event.drift-cleared",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",
@@ -96,7 +96,7 @@
   {
     "name": "full on the seat's subject",
     "of": "event:full",
-    "subject": "mesh.seat.mesh-broker.said.full",
+    "subject": "mesh.seat.mesh-broker.event.full",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",
@@ -119,7 +119,7 @@
   {
     "name": "full-cleared on the seat's subject",
     "of": "event:full-cleared",
-    "subject": "mesh.seat.mesh-broker.said.full-cleared",
+    "subject": "mesh.seat.mesh-broker.event.full-cleared",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",
@@ -142,7 +142,7 @@
   {
     "name": "orphaned on the seat's subject",
     "of": "event:orphaned",
-    "subject": "mesh.seat.mesh-broker.said.orphaned",
+    "subject": "mesh.seat.mesh-broker.event.orphaned",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",
@@ -165,7 +165,7 @@
   {
     "name": "recreated on the seat's subject",
     "of": "event:recreated",
-    "subject": "mesh.seat.mesh-broker.said.recreated",
+    "subject": "mesh.seat.mesh-broker.event.recreated",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",
@@ -189,7 +189,7 @@
   {
     "name": "dropped on the seat's subject",
     "of": "event:dropped",
-    "subject": "mesh.seat.mesh-broker.said.dropped",
+    "subject": "mesh.seat.mesh-broker.event.dropped",
     "given": {
       "module": "mesh-knowledge",
       "local-name": "ledger",

seats/mesh-broker/seat.json

@@ -251,9 +251,7 @@
   ],
   "family": {
     "name": "mesh-broker.events",
-    "max-age-days": 30,
-    "max-mib": 256,
-    "token": "said"
+    "max-age-days": 7
   },
   "provisions": [
     {