chore(m2): 保存功能验收及后续清理前检查点

Client/Assets/Scripts/Services/PlayerData/PlayerKVRuntimeSelection.cs

@@ -26,8 +26,6 @@ namespace game.PlayerDataStorage
                 return new PlayerKVRuntimeSelection(false, null);
             if (backend != "kv")
                 throw new ArgumentException("Unsupported save backend.", nameof(backend));
-            if (agg)
-                throw new InvalidOperationException("KV login is not enabled for AGG channels.");
             if (!string.Equals(api, FormalApiUrl, StringComparison.Ordinal))
                 throw new ArgumentException("KV API address does not match the reviewed endpoint.", nameof(api));
             return new PlayerKVRuntimeSelection(true, new Uri(FormalApiUrl));