n8n: its media library is an access placed by the assignment

The container mounted /services/media literally — one installation's path
(ADR 0112). The access is now declared by id and mounted as ${access:media};
the assignment says where the library is (ace: /storage/media, hq 153).

modules/n8n/module.json

@@ -26,7 +26,7 @@
   },
   "accesses": [
     {
-      "path": "/services/media",
+      "id": "media",
       "mode": "read-write"
     }
   ],
@@ -93,7 +93,7 @@
       "volumes": [
         "${dir:data}:/home/node/.n8n",
         "${dir:state}/n8n-database.secret:/run/secrets/database:ro",
-        "/services/media:/media-library"
+        "${access:media}:/media-library"
       ]
     },
     {