update vault contract

contracts/ytVault/YTAssetFactory.sol

@@ -170,7 +170,7 @@ contract YTAssetFactory is Initializable, UUPSUpgradeable, OwnableUpgradeable {
         uint256[] memory _redemptionTimes,
         uint256[] memory _initialYtPrices,
         address _usdcPriceFeed
-    ) external returns (address[] memory vaults) {
+    ) external onlyOwner returns (address[] memory vaults) {
         require(
             _names.length == _symbols.length &&
             _names.length == _managers.length &&

contracts/ytVault/YTAssetVault.sol

@@ -130,7 +130,7 @@ contract YTAssetVault is
      * @param _symbol YT代币符号
      * @param _manager 管理员地址
      * @param _hardCap 硬顶限制
-     * @param _usdc USDC代币地址（可选，传0则使用默认地址）
+     * @param _usdc USDC代币地址
      * @param _redemptionTime 赎回时间（Unix时间戳）
      * @param _initialYtPrice 初始YT价格（精度1e30，传0则使用默认值1.0）
      */
@@ -364,13 +364,9 @@ contract YTAssetVault is
         external 
         nonReentrant 
         whenNotPaused
+        onlyManager
         returns (uint256 processedCount, uint256 totalDistributed) 
     {
-        // 权限检查：只有manager或factory可以调用
-        if (msg.sender != manager && msg.sender != factory) {
-            revert Forbidden();
-        }
-        
         if (_batchSize == 0) revert InvalidBatchSize();
         
         uint256 availableUSDC = IERC20(usdcAddress).balanceOf(address(this));