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

cmd/mesh-compose/testdata/mesh-catalog/modules/distribution/module.json.captured

@@ -0,0 +1,96 @@
+{
+  "module": "distribution",
+  "version": "1",
+  "provides": [
+    {
+      "name": "artifact-store",
+      "scope": "mesh"
+    }
+  ],
+  "claims": [
+    {
+      "name": "mesh-artifact-store",
+      "scope": "mesh"
+    }
+  ],
+  "capabilities": [
+    "container-runtime"
+  ],
+  "own-secrets": {
+    "broker": "/var/lib/mesh/registry/broker"
+  },
+  "serves": {
+    "artifact-store": {
+      "port": 5000
+    }
+  },
+  "listens": [
+    {
+      "name": "registry",
+      "port": 5000,
+      "protocol": "tcp",
+      "from": "mesh",
+      "why": "every machine pulls images and artifacts from here"
+    }
+  ],
+  "data": {
+    "own": [
+      {
+        "id": "registry",
+        "path": "${dir:registry-data}",
+        "class": "rebuildable",
+        "backup": "none",
+        "measure": "shallow",
+        "why": "the artifact store: every image is built again from its source, and too large to copy every night (ADR 0214 left it out)"
+      }
+    ]
+  },
+  "resources": [
+    {
+      "id": "state",
+      "type": "directory",
+      "path": "/var/lib/mesh/registry",
+      "mode": "0700",
+      "unknown": "program"
+    },
+    {
+      "id": "registry-data",
+      "type": "directory",
+      "path": "/var/lib/mesh-registry",
+      "mode": "0700",
+      "unknown": "program"
+    },
+    {
+      "id": "store",
+      "type": "container",
+      "name": "mesh-registry",
+      "image": "registry@sha256:a3d8aaa63ed8681a604f1dea0aa03f100d5895b6a58ace528858a7b332415373",
+      "ports": [
+        "5000:5000"
+      ],
+      "volumes": [
+        "/var/lib/mesh-registry:/var/lib/registry"
+      ],
+      "env": {
+        "REGISTRY_STORAGE_DELETE_ENABLED": "true"
+      }
+    },
+    {
+      "id": "collect",
+      "type": "container",
+      "name": "mesh-registry-collect",
+      "image": "registry@sha256:a3d8aaa63ed8681a604f1dea0aa03f100d5895b6a58ace528858a7b332415373",
+      "volumes": [
+        "/var/lib/mesh-registry:/var/lib/registry"
+      ],
+      "args": [
+        "garbage-collect",
+        "/etc/docker/registry/config.yml"
+      ],
+      "schedule": "30 3 * * *",
+      "while-stopped": [
+        "store"
+      ]
+    }
+  ]
+}