postgres serves the store seat's verbs, databases and query, and lists its tools (hq ADR 0159)

Named as the seat names them so the runtime finds them by name; the same calls as its own tools.
Its definition now lists its tools, which is what holding a seat with verbs demands at registration.
Merge before the controller declares the verbs on the mesh-store seat.

modules/postgres/module.json

@@ -133,5 +133,11 @@
         "from": "Dockerfile"
       }
     ]
-  }
+  },
+  "tools": [
+    "databases",
+    "query",
+    "postgres_list_databases",
+    "postgres_query"
+  ]
 }