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" }
+    ]
+  }
 }

hub/internal/store/dr_recipe_test.go

@@ -16,7 +16,7 @@ const drHostHalf = `{
   "recipe_version": 1,
   "guests": [ { "vmid": 9201, "cores": 4, "memory_bytes": 12884901888, "disk_bytes": 34359738368 } ],
   "pbs": { "repo_id": "felhom-pbs", "namespace": "root", "latest_snapshot_id": "9201" },
-  "drives": [ { "durable_id": "uuid:da9e7089-cf8e-4617-adcb-a377743fae00", "role": "bulk-data", "mount_path": "/mnt/felhom-usb", "intent": "enrolled", "total_bytes": 1000000000000 } ],
+  "drives": [ { "durable_id": "uuid:da9e7089-cf8e-4617-adcb-a377743fae00", "mount_path": "/mnt/felhom-usb", "intent": "enrolled", "total_bytes": 1000000000000 } ],
   "pve_storage": [ { "name": "local-lvm", "type": "lvmthin", "content": "rootdir,images" }, { "name": "felhom-usb", "type": "usb", "content": "backup" } ]
 }`
 
@@ -104,6 +104,35 @@ func TestAssembleDRRecipe_MatchesGolden(t *testing.T) {
 	}
 }
 
+// TestAssembleDRRecipe_V1DriveShape is the regression guard for the v1 host-half drive shape
+// (agent v0.39.0 dropped role + restic_repo_coord): a stored host half whose drives carry NEITHER
+// field, but WHICH HAS a pbs block, must assemble cleanly — pbs present, drives passed through
+// verbatim (RawMessage passthrough means the hub needs no struct change for the dropped fields).
+func TestAssembleDRRecipe_V1DriveShape(t *testing.T) {
+	const v1Host = `{
+	  "recipe_version": 1,
+	  "guests": [ { "vmid": 9201, "cores": 4, "memory_bytes": 12884901888, "disk_bytes": 34359738368 } ],
+	  "pbs": { "repo_id": "felhom-pbs", "namespace": "root", "latest_snapshot_id": "9201" },
+	  "drives": [ { "durable_id": "uuid:da9e7089", "mount_path": "/mnt/felhom-usb", "intent": "enrolled", "total_bytes": 1000000000000 } ],
+	  "pve_storage": [ { "name": "felhom-usb", "type": "usb", "content": "backup" } ]
+	}`
+	asm, err := AssembleDRRecipe(&DRRecipe{CustomerID: "c", RecipeVersion: 1, HostHalfJSON: v1Host})
+	if err != nil {
+		t.Fatalf("v1 host half failed to assemble: %v", err)
+	}
+	// pbs must survive the stitch.
+	if !jsonContains(t, asm.PBS, "felhom-pbs") || !jsonContains(t, asm.PBS, "9201") {
+		t.Errorf("pbs coord not carried through assembly: %s", asm.PBS)
+	}
+	// drives passed through verbatim, and carry NEITHER dropped field.
+	if !jsonContains(t, asm.Drives, "uuid:da9e7089") {
+		t.Errorf("drives not passed through: %s", asm.Drives)
+	}
+	if strings.Contains(string(asm.Drives), "role") || strings.Contains(string(asm.Drives), "restic_repo_coord") {
+		t.Errorf("v1 drives must not carry role/restic_repo_coord: %s", asm.Drives)
+	}
+}
+
 // TestAssembleDRRecipe_IgnoreUnknownAndVersionSkew: a half carrying an UNKNOWN top-level field and a
 // HIGHER recipe_version still assembles (forward-compat), and recipe_version reflects the max.
 func TestAssembleDRRecipe_IgnoreUnknownAndVersionSkew(t *testing.T) {

hub/internal/store/testdata/dr-recipe.golden.json

@@ -8,7 +8,6 @@
   "drives": [
     {
       "durable_id": "uuid:da9e7089-cf8e-4617-adcb-a377743fae00",
-      "role": "bulk-data",
       "mount_path": "/mnt/felhom-usb",
       "intent": "enrolled",
       "total_bytes": 1000000000000