The mesh's own files for a module are placed by the mesh, not the definition (issue 174)

48 definitions stop naming /var/lib/mesh/<module>: the directory says `place: "mesh"`, the two
subdirectories beneath it (gitea's runtime state, anthropic-manager's output) state their path
beneath it, and every credential, binding, merged file and mount names it as ${dir:mesh-state}.
Resolved on the default root, every definition names exactly the paths it named before —
TestPlacedDirectoriesKeepTheirPaths in mesh-controller, run over both checkouts. Needs the
controller that knows the word (mesh-controller, same branch) one release ahead.

modules/bookshelf/module.json

@@ -11,7 +11,7 @@
   ],
   "consumes": [],
   "own-secrets": {
-    "broker": "/var/lib/mesh/bookshelf/broker"
+    "broker": "${dir:mesh-state}/broker"
   },
   "listens": [
     {
@@ -36,8 +36,8 @@
     {
       "id": "mesh-state",
       "type": "directory",
-      "path": "/var/lib/mesh/bookshelf",
-      "mode": "0700"
+      "mode": "0700",
+      "place": "mesh"
     },
     {
       "id": "config",
@@ -71,7 +71,7 @@
       "name": "mesh-bookshelf",
       "network": "host",
       "volumes": [
-        "/var/lib/mesh/bookshelf/broker:/run/secrets/broker:ro",
+        "${dir:mesh-state}/broker:/run/secrets/broker:ro",
         "/services/bookshelf/config:/var/lib/bookshelf/config:ro"
       ],
       "env": {
@@ -92,7 +92,7 @@
     }
   },
   "binds": {
-    "route": "/var/lib/mesh/bookshelf/route.json"
+    "route": "${dir:mesh-state}/route.json"
   },
   "build": {
     "on": [