The node-engine owns the composition it alone runs (H1, H2)

ADR 0593 §1 and §7: compose, its bus reader and runtime reader, takein,
validate, the overlay generator, the composer's run and mesh-compose, and
the judgement of a move leave mesh-sdk for the node-engine's internal
packages, so no other module composes and a change to them rebuilds only
the node-engine. The shapes others read (the composer's request and
verdict, the overlay's names, compositions and answers) stay in mesh-sdk.
The node's grant is now a golden file of what the grants part composes,
since the composer of the bus's user list leaves mesh-sdk too.

Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL

internal/compose/frombus/testdata/f1-circuits-c0ea2c94.module.json

@@ -0,0 +1,82 @@
+{
+  "module": "f1-circuits",
+  "slug": "f1",
+  "version": "1",
+  "capabilities": [
+    "container-runtime"
+  ],
+  "requires": [
+    "route"
+  ],
+  "contributes": {
+    "route": {
+      "label": "f1-circuits",
+      "endpoint": "web"
+    }
+  },
+  "binds": {
+    "route": "${dir:state}/route.json"
+  },
+  "listens": [
+    {
+      "name": "web",
+      "port": 8000,
+      "protocol": "tcp",
+      "from": "mesh",
+      "why": "the track-layout CDN, the race posters and the Kometa metadata over http; its public name is a route grant and the proxy reaches it here. Kometa fetches the metadata and every poster by that public name"
+    }
+  ],
+  "resources": [
+    {
+      "id": "state",
+      "type": "directory",
+      "mode": "0700",
+      "place": "."
+    },
+    {
+      "id": "cache",
+      "type": "directory",
+      "mode": "0700"
+    },
+    {
+      "id": "site-env",
+      "type": "file",
+      "path": "${dir:state}/site.env",
+      "mode": "0644",
+      "content": "F1_CIRCUITS_BASE_URL=https://${bound:route:name}\n"
+    },
+    {
+      "id": "server",
+      "type": "container",
+      "name": "f1-circuits",
+      "artifact": "cdn",
+      "ports": [
+        "8000"
+      ],
+      "env-file": [
+        "${dir:state}/site.env"
+      ],
+      "volumes": [
+        "${dir:cache}:/app/cache"
+      ],
+      "restart-on": [
+        "site-env"
+      ]
+    }
+  ],
+  "build": {
+    "on": [
+      {
+        "arg": "PYTHON_BASE",
+        "image": "python@sha256:6d43704baacd1bfbe7c295d7f13079d5d8104ed33568873133f8fc69980419df"
+      }
+    ],
+    "artifacts": [
+      {
+        "name": "cdn",
+        "kind": "image",
+        "from": "service/Dockerfile"
+      }
+    ]
+  }
+}