update vault contract

contracts/ytVault/YTAssetVault.sol

@@ -250,13 +250,10 @@ contract YTAssetVault is
     function processBatchWithdrawals(uint256 _batchSize) 
         external 
         nonReentrant 
+        onlyManager
         whenNotPaused
         returns (uint256 processedCount, uint256 totalDistributed) 
     {
-        if (msg.sender != manager && msg.sender != factory) {
-            revert Forbidden();
-        }
-        
         if (_batchSize == 0) revert InvalidBatchSize();
         
         uint256 availableUSDC = IERC20(usdcAddress).balanceOf(address(this));