fix(ctb): missing FeeVault comments

Adds missing constructor comments in the FeeVault contracts.

packages/contracts-bedrock/contracts/L2/BaseFeeVault.sol

@@ -13,6 +13,8 @@ import { FeeVault } from "../universal/FeeVault.sol";
 contract BaseFeeVault is FeeVault, Semver {
     /**
      * @custom:semver 0.0.1
+     *
+     * @param _recipient Address that will receive the accumulated fees.
      */
     constructor(address _recipient) FeeVault(_recipient, 10 ether) Semver(0, 0, 1) {}
 }

packages/contracts-bedrock/contracts/L2/L1FeeVault.sol

@@ -13,6 +13,8 @@ import { FeeVault } from "../universal/FeeVault.sol";
 contract L1FeeVault is FeeVault, Semver {
     /**
      * @custom:semver 0.0.1
+     *
+     * @param _recipient Address that will receive the accumulated fees.
      */
     constructor(address _recipient) FeeVault(_recipient, 10 ether) Semver(0, 0, 1) {}
 }

packages/contracts-bedrock/contracts/L2/SequencerFeeVault.sol

@@ -32,6 +32,8 @@ contract SequencerFeeVaultLegacySpacer {
 contract SequencerFeeVault is SequencerFeeVaultLegacySpacer, FeeVault, Semver {
     /**
      * @custom:semver 0.0.1
+     *
+     * @param _recipient Address that will receive the accumulated fees.
      */
     constructor(address _recipient) FeeVault(_recipient, 10 ether) Semver(0, 0, 1) {}
 

packages/contracts-bedrock/contracts/universal/FeeVault.sol

@@ -6,11 +6,16 @@ import { Predeploys } from "../libraries/Predeploys.sol";
 
 /**
  * @title FeeVault
- * @notice The FeeVault contract has the base logic for handling transaction fees.
+ * @notice The FeeVault contract contains the basic logic for the various different vault contracts
+ *         used to hold fee revenue generated by the L2 system.
  */
 abstract contract FeeVault {
     /**
-     * @notice Emits each time that a withdrawal occurs
+     * @notice Emits each time that a withdrawal occurs.
+     *
+     * @param value Amount that was withdrawn (in wei).
+     * @param to    Address that the funds were sent to.
+     * @param from  Address that triggered the withdrawal.
      */
     event Withdrawal(uint256 value, address to, address from);
 
@@ -30,9 +35,8 @@ abstract contract FeeVault {
     uint256 public totalProcessed;
 
     /**
-     * @param _recipient - The L1 account that funds can be withdrawn to.
-     * @param _minWithdrawalAmount - The min amount of funds before a withdrawal
-     *        can be triggered.
+     * @param _recipient           Wallet that will receive the fees on L1.
+     * @param _minWithdrawalAmount Minimum balance before a withdrawal can be triggered.
      */
     constructor(address _recipient, uint256 _minWithdrawalAmount) {
         MIN_WITHDRAWAL_AMOUNT = _minWithdrawalAmount;