A definition names no host path for its own data

Twenty-eight modules' data directories are placed: the root as place ".", a sub-directory named by
its id, and every host-side reference — binds, secrets, own secrets, grants, receives, file paths,
mounts, env-files — as ${dir:<id>}. Resolved on the default root every path is the one the manifest
named before, which the controller's TestPlacedDirectoriesKeepTheirPaths proves over both checkouts;
so no data moves and no machine sees a change. Five directories whose id is not their last segment
keep their path as a placement (novox/hq issue 119, ADR 0112, design 27).

modules/route-adapter/module.json

@@ -15,7 +15,7 @@
     "route": {}
   },
   "receives": {
-    "route": "/var/lib/route-adapter/routes/mesh.json"
+    "route": "${dir:routes-dir}/mesh.json"
   },
   "accesses": [
     {
@@ -27,8 +27,8 @@
     {
       "id": "state",
       "type": "directory",
-      "path": "/var/lib/route-adapter",
-      "mode": "0700"
+      "mode": "0700",
+      "place": "."
     },
     {
       "id": "routes-dir",
@@ -39,7 +39,7 @@
     {
       "id": "config",
       "type": "file",
-      "path": "/var/lib/route-adapter/config.json",
+      "path": "${dir:state}/config.json",
       "merge": "json",
       "mode": "0644",
       "content": "{\n  \"dynamic\": \"/services/traefik/dynamic\",\n  \"entrypoint\": \"websecure\",\n  \"certificate-resolver\": \"le\",\n  \"machine\": \"host.docker.internal\"\n}\n"
@@ -51,12 +51,12 @@
       "artifact": "runtime",
       "run-once": true,
       "volumes": [
-        "/var/lib/route-adapter/routes/mesh.json:/var/lib/route-adapter/routes/mesh.json:ro",
-        "/var/lib/route-adapter/config.json:/run/config/config.json:ro",
+        "${dir:routes-dir}/mesh.json:${dir:routes-dir}/mesh.json:ro",
+        "${dir:state}/config.json:/run/config/config.json:ro",
         "/services/traefik/dynamic:/services/traefik/dynamic"
       ],
       "env": {
-        "MESH_RECEIVES": "/var/lib/route-adapter/routes/mesh.json",
+        "MESH_RECEIVES": "${dir:routes-dir}/mesh.json",
         "MESH_ROUTE_ADAPTER_CONFIG": "/run/config/config.json"
       },
       "args": [