Capture mesh-catalog at feat/r4g (2246ccc4) with the templates its manifests name and its predefined.json, and lay the copy out as a repository's root

The catalogue's manifests moved their content into template files and fall back to predefined keys, so a copy of
module.json alone no longer passes the catalogue's own check; the bus's Dockerfile is gone from the catalogue.

testdata/beside/mesh-catalog/modules/n8n/module.json.captured

@@ -60,19 +60,22 @@
       "id": "state",
       "type": "directory",
       "mode": "0700",
-      "place": "."
+      "place": ".",
+      "unknown": "program"
     },
     {
       "id": "data",
       "type": "directory",
       "mode": "0700",
-      "owner": "1000:1000"
+      "owner": "1000:1000",
+      "unknown": "program"
     },
     {
       "id": "cache",
       "type": "directory",
       "mode": "0700",
-      "owner": "999:999"
+      "owner": "999:999",
+      "unknown": "program"
     },
     {
       "id": "database-secret",
@@ -80,14 +83,14 @@
       "path": "${dir:state}/n8n-database.secret",
       "mode": "0400",
       "owner": "1000:1000",
-      "content": "${secret:postgres-database}"
+      "template": "files/n8n-database.secret"
     },
     {
       "id": "server-env",
       "type": "file",
       "path": "${dir:state}/server.env",
       "mode": "0600",
-      "content": "N8N_HOST=${bound:route:name}\nN8N_PORT=5678\nN8N_PROTOCOL=https\nWEBHOOK_URL=https://${bound:route:name}/\nNODE_FUNCTION_ALLOW_BUILTIN=*\nNODE_FUNCTION_ALLOW_EXTERNAL=*\nDB_TYPE=postgresdb\nDB_POSTGRESDB_HOST=${bound:postgres-database:at}\nDB_POSTGRESDB_PORT=${bound:postgres-database:port}\nDB_POSTGRESDB_DATABASE=${bound:postgres-database:as}\nDB_POSTGRESDB_USER=${bound:postgres-database:as}\nDB_POSTGRESDB_PASSWORD_FILE=/run/secrets/database\n"
+      "template": "files/server.env"
     },
     {
       "id": "net",
@@ -97,6 +100,13 @@
     {
       "id": "server",
       "type": "container",
+      "health": {
+        "kind": "http",
+        "endpoint": "web",
+        "path": "/healthz/readiness",
+        "status": 200,
+        "needs": "postgres-database"
+      },
       "name": "n8n",
       "artifact": "server",
       "network": "n8n",
@@ -152,6 +162,11 @@
         "name": "server",
         "kind": "image",
         "from": "Dockerfile"
+      },
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
       }
     ]
   }