hub v0.13.1 — DR recipe v1 drive-shape sync (test-data + regression guard only)

Tracks felhom-agent v0.39.0, which dropped role + restic_repo_coord from the host-half
drives[]. Hub reads drives as json.RawMessage (verbatim passthrough) → no store/handler
change needed. Dropped role from the store golden + drHostHalf fixture; re-synced the api
host-report golden byte-identical with the agent copy (it previously lacked dr_recipe
entirely). Added TestAssembleDRRecipe_V1DriveShape regression guard (demonstrated to fail
when the fixture re-adds role, then reverted). No behavior change; redeploy optional.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

hub/internal/api/testdata/host-report.golden.json

@@ -131,5 +131,28 @@
     }
   ],
   "cloudflared": { "status": "active" },
-  "audit_tail": []
+  "audit_tail": [],
+  "dr_recipe": {
+    "recipe_version": 1,
+    "guests": [
+      { "vmid": 100, "cores": 2, "memory_bytes": 2147483648, "disk_bytes": 21474836480 }
+    ],
+    "pbs": {
+      "repo_id": "felhom-pbs",
+      "namespace": "root",
+      "latest_snapshot_id": "9001"
+    },
+    "drives": [
+      {
+        "durable_id": "uuid:0fc63daf-8483-4772-8e79-3d69d8477de4",
+        "mount_path": "/mnt/usb-backup",
+        "intent": "enrolled",
+        "total_bytes": 2000000000000
+      }
+    ],
+    "pve_storage": [
+      { "name": "local-lvm", "type": "lvmthin", "content": "rootdir,images" },
+      { "name": "usb-backup", "type": "usb", "content": "backup" }
+    ]
+  }
 }