chore: update standalone state hub wiring

docs/activity-core-delegation.md

@@ -24,7 +24,7 @@ events** on NATS JetStream so activity-core can react.
    POST /domain-goals/*/activate           │                      │                       │
    scripts/cleanup_stale_tasks.py          │                      │                       ▼
                                            └──────────────────────┘                 RunActivityWorkflow
-   the-custodian/state-hub                                                          (creates tasks in
+   state-hub                                                          (creates tasks in
                                                                                      issue-core, etc.)
 ```
 
@@ -147,5 +147,5 @@ curl -X POST http://127.0.0.1:8000/repos/<slug>/sync
 
 # Observe the envelope on the subscriber. Sample shape:
 # {"id":"...","type":"org.statehub.workstream.completed","version":"1.0",
-#  "timestamp":"...","publisher":"the-custodian/state-hub","attributes":{...}}
+#  "timestamp":"...","publisher":"state-hub","attributes":{...}}
 ```