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/grafana/module.json

@@ -5,8 +5,8 @@
     "alert.firing"
   ],
   "own-secrets": {
-    "admin": "/var/lib/mesh/grafana/admin",
-    "broker": "/var/lib/mesh/grafana/broker"
+    "admin": "${dir:mesh-state}/admin",
+    "broker": "${dir:mesh-state}/broker"
   },
   "capabilities": [
     "container-runtime"
@@ -24,8 +24,8 @@
     {
       "id": "mesh-state",
       "type": "directory",
-      "path": "/var/lib/mesh/grafana",
-      "mode": "0700"
+      "mode": "0700",
+      "place": "mesh"
     },
     {
       "id": "state",
@@ -108,7 +108,7 @@
     {
       "id": "runtime-config",
       "type": "file",
-      "path": "/var/lib/mesh/grafana/config.json",
+      "path": "${dir:mesh-state}/config.json",
       "mode": "0600",
       "content": "{\n  \"user\": \"admin\",\n  \"password\": \"${secret:admin}\"\n}\n",
       "merge": "json"
@@ -119,8 +119,8 @@
       "name": "mesh-grafana",
       "network": "host",
       "volumes": [
-        "/var/lib/mesh/grafana/broker:/run/secrets/broker:ro",
-        "/var/lib/mesh/grafana/config.json:/run/config/config.json:ro"
+        "${dir:mesh-state}/broker:/run/secrets/broker:ro",
+        "${dir:mesh-state}/config.json:/run/config/config.json:ro"
       ],
       "env": {
         "MESH_BROKER_FILE": "/run/secrets/broker",
@@ -158,8 +158,8 @@
     "influxdb-api": "${dir:state}/influxdb.json"
   },
   "secrets": {
-    "oidc-client": "/var/lib/mesh/grafana/oidc-client",
-    "influxdb-api": "/var/lib/mesh/grafana/influxdb-api"
+    "oidc-client": "${dir:mesh-state}/oidc-client",
+    "influxdb-api": "${dir:mesh-state}/influxdb-api"
   },
   "build": {
     "on": [