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/builder/module.json

@@ -15,20 +15,20 @@
     "npm-package-registry"
   ],
   "binds": {
-    "npm-package-registry": "/var/lib/mesh/builder/package-registry.json"
+    "npm-package-registry": "${dir:mesh-state}/package-registry.json"
   },
   "secrets": {
-    "npm-package-registry": "/var/lib/mesh/builder/package-registry.secret"
+    "npm-package-registry": "${dir:mesh-state}/package-registry.secret"
   },
   "own-secrets": {
-    "broker": "/var/lib/mesh/builder/broker"
+    "broker": "${dir:mesh-state}/broker"
   },
   "resources": [
     {
       "id": "mesh-state",
       "type": "directory",
-      "path": "/var/lib/mesh/builder",
-      "mode": "0700"
+      "mode": "0700",
+      "place": "mesh"
     },
     {
       "id": "workspace",
@@ -38,7 +38,7 @@
     {
       "id": "builder-env",
       "type": "file",
-      "path": "/var/lib/mesh/builder/builder.env",
+      "path": "${dir:mesh-state}/builder.env",
       "mode": "0600",
       "content": "MESH_BROKER_FILE=/run/mesh/broker\nMESH_NODE=${machine:name}\nMESH_REGISTRY=${bound:artifact-store:at}:${bound:artifact-store:port}\nMESH_PACKAGE_BINDING=/run/mesh/package-registry.json\nMESH_NPM_TOKEN_FILE=/run/mesh/package-registry.secret\nMESH_WORKSPACE=${dir:workspace}\n"
     },
@@ -48,10 +48,10 @@
       "name": "mesh-builder",
       "artifact": "server",
       "env-file": [
-        "/var/lib/mesh/builder/builder.env"
+        "${dir:mesh-state}/builder.env"
       ],
       "volumes": [
-        "/var/lib/mesh/builder:/run/mesh:ro",
+        "${dir:mesh-state}:/run/mesh:ro",
         "${dir:workspace}:${dir:workspace}",
         "/var/run/docker.sock:/var/run/docker.sock"
       ],