fix: correct NatSpec tags, typo, and parameter naming

[memosr]

Summary

Three small but real fixes across dispute game and system config contracts.

Changes

1. @notice → @param for _disputed parameter (2 files)

The wrong tag type means NatSpec tooling (forge doc, etherscan) renders these parameters as undocumented while the description shows up as a stray contract notice.

src/L1/proofs/v2/FaultDisputeGameV2.sol (line 567, defend()):

- /// @notice _disputed The `Claim` being defended.
+ /// @param _disputed The `Claim` being defended.

src/L1/proofs/v2/PermissionedDisputeGameV2.sol (line 52, move()):

- /// @notice _disputed The disputed `Claim`.
+ /// @param _disputed The disputed `Claim`.

The sibling attack() function already uses the correct @param _disputed tag, making the inconsistency obvious.

2. Typo: PreimageOralce → PreimageOracle

src/L1/proofs/v2/FaultDisputeGameV2.sol (line 575):

- /// @notice Posts the requested local data to the VM's `PreimageOralce`.
+ /// @notice Posts the requested local data to the VM's `PreimageOracle`.

The contract name is misspelled in a backtick-wrapped type reference, which would render as a broken link in generated docs.

3. Parameter naming: _dAFootprintGasScalar → _daFootprintGasScalar

src/L1/SystemConfig.sol (lines 479-482):

- function _setDAFootprintGasScalar(uint16 _dAFootprintGasScalar) internal {
-     daFootprintGasScalar = _dAFootprintGasScalar;
-     bytes memory data = abi.encode(_dAFootprintGasScalar);
+ function _setDAFootprintGasScalar(uint16 _daFootprintGasScalar) internal {
+     daFootprintGasScalar = _daFootprintGasScalar;
+     bytes memory data = abi.encode(_daFootprintGasScalar);

The "DA" abbreviation should be a single lowercase prefix in camelCase. The public wrapper, the storage variable (daFootprintGasScalar), and the NatSpec @param tag at line 473 all use the lowercase-a form. This was likely a copy-paste error where "DA" was typed as two separate letters.

Verification

• ✅ All changes verified locally
• ✅ Only the 3 specified files touched
• ✅ Internal naming consistency confirmed against existing patterns in each file

[cb-heimdall]

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