Let the build agent run on the genesis document until its registry binds (hq issue 121, ADR 0336)

With npm-package-registry optional, the binding file the agent's environment
names may be absent, and mesh-builder failed every build on reading it. It now
reads the genesis document the installer seals at genesis's packages step when
no binding is present, prefers the binding when both are, and each build's log
says which it resolved from (§4). A build that needs the registry - a package,
an image naming .npmrc, TypeScript with an @novox/ dependency - on an agent with
neither is refused before anything is built or published, naming the machine,
the unbound requirement and gitea (§6); it never falls back to the public
registry. The captured catalogue moves to the mesh-catalog change it is judged
with.

testdata/beside/mesh-catalog/modules/artifact-store-tools/module.json.captured

@@ -3,7 +3,9 @@
   "version": "1",
   "invokes": [
     "seat:mesh-controller.artifacts",
-    "seat:mesh-controller.collect"
+    "seat:mesh-controller.collect",
+    "mesh-catalog.catalog_modules",
+    "mesh-catalog.catalog_module"
   ],
   "tools": [
     "artifact_store_repositories",
@@ -11,6 +13,29 @@
     "artifact_store_references",
     "artifact_store_collect"
   ],
+  "settings": {
+    "older-store-names": {
+      "kind": "preference",
+      "default": "none",
+      "why": "the names the artifact store had before, as a definition may still pin an image under them: host names or host:port, separated by spaces; none when it had no other. artifact_store_references reads every definition under these as well as under the store's current name, so an image a definition pins under one is said to be named by a definition (novox/hq issue 323)"
+    }
+  },
+  "resources": [
+    {
+      "id": "state",
+      "type": "directory",
+      "mode": "0700",
+      "place": "."
+    },
+    {
+      "id": "store-names",
+      "type": "file",
+      "path": "${dir:state}/store-names",
+      "mode": "0600",
+      "trusted": false,
+      "content": "# The names the artifact store had before, from the setting older-store-names, written by the mesh.\n# artifact_store_references reads every definition under these too (novox/hq issue 323).\n# Replaced on every push; change the setting, never this file.\nolder=${setting:older-store-names}\n"
+    }
+  ],
   "build": {
     "artifacts": [
       {
@@ -24,7 +49,8 @@
           "artifact-store-tools"
         ],
         "env": {
-          "MESH_ARTIFACT_STORE_CONTAINER": "mesh-registry"
+          "MESH_ARTIFACT_STORE_CONTAINER": "mesh-registry",
+          "MESH_ARTIFACT_STORE_NAMES_FILE": "${dir:state}/store-names"
         }
       }
     ]