Providers read the seat's plans and retire only on the operator's yes, removing the credential

ADR 0570 clauses 2 and 5: gitea, keycloak, postgres and route-adapter read mesh-provisioner.plans and
.provisions instead of the controller's assignments. postgres hands the database to a keeper and drops the
login; keycloak replaces the client's secret and keeps the client, so the data stays (issue 1954, V4).

modules/keycloak/module.json

@@ -241,6 +241,7 @@
     "bound"
   ],
   "reads": [
-    "mesh-controller.assignments"
+    "mesh-provisioner.plans",
+    "mesh-provisioner.provisions"
   ]
 }