Fix & Optimize contract

contracts/ytLp/core/YTPoolManager.sol

@@ -18,6 +18,11 @@ import "../../interfaces/IUSDY.sol";
 contract YTPoolManager is Initializable, UUPSUpgradeable, ReentrancyGuardUpgradeable {
     using SafeERC20 for IERC20;
     
+    /// @custom:oz-upgrades-unsafe-allow constructor
+    constructor() {
+        _disableInitializers();
+    }
+    
     error Forbidden();
     error InvalidAddress();
     error InvalidDuration();
@@ -64,6 +69,8 @@ contract YTPoolManager is Initializable, UUPSUpgradeable, ReentrancyGuardUpgrade
     );
     event CooldownDurationSet(uint256 duration);
     event HandlerSet(address indexed handler, bool isActive);
+    event GovChanged(address indexed oldGov, address indexed newGov);
+    event AumAdjustmentChanged(uint256 addition, uint256 deduction);
     
     modifier onlyGov() {
         if (msg.sender != gov) revert Forbidden();
@@ -109,7 +116,9 @@ contract YTPoolManager is Initializable, UUPSUpgradeable, ReentrancyGuardUpgrade
     
     function setGov(address _gov) external onlyGov {
         if (_gov == address(0)) revert InvalidAddress();
+        address oldGov = gov;
         gov = _gov;
+        emit GovChanged(oldGov, _gov);
     }
     
     function setHandler(address _handler, bool _isActive) external onlyGov {
@@ -126,6 +135,7 @@ contract YTPoolManager is Initializable, UUPSUpgradeable, ReentrancyGuardUpgrade
     function setAumAdjustment(uint256 _addition, uint256 _deduction) external onlyGov {
         aumAddition = _addition;
         aumDeduction = _deduction;
+        emit AumAdjustmentChanged(_addition, _deduction);
     }
     
     /**