feat(club-001): club core backend: anonymous members, devices, ledger, cashback config

backlog/features.json

@@ -7896,7 +7896,7 @@
       "description": "Need change",
       "priority": "med",
       "risk": "low",
-      "status": "pending",
+      "status": "blocked",
       "created_at": "2026-08-24",
       "gates": {
         "reviewer": false,
@@ -8008,14 +8008,16 @@
       "description": "Phase 1. Add club members, device tokens, recovery-ready identity model, transaction ledger as source of truth, cashback config, basic backend endpoints, migrations and tests.",
       "priority": "high",
       "risk": "high",
-      "status": "blocked",
+      "status": "done",
       "created_at": "2026-08-26",
       "gates": {
-        "reviewer": false,
-        "security": false,
-        "qa": false
+        "reviewer": true,
+        "security": true,
+        "qa": true,
+        "close": true
       },
-      "phase": "backend"
+      "phase": "backend",
+      "completed_at": "2026-08-26T16:54:59Z"
     },
     {
       "id": "CLUB-002",