Update test vectors to match current implementation

[ch4r10t33r]

Description

The current test vectors need to be updated to match the current implementation. There's a commented out test case that needs to be updated with correct expected values.

Current TODO Comment

// TODO: Update test vectors to match current implementation
// .{
//     .input_state = [_]F.FieldElem{42} ** 16,
//     .output_state = .{ 834546835, 1886829340, 1792314086, 1487871337, 567666274, 1133976664, 445360408, 630502830, 161668903, 153566288, 448274346, 619034796, 1156499614, 1851146900, 777523375, 393617892 },
// },

Tasks

• Run the current implementation with the input state [42] ** 16
• Capture the actual output state
• Update the test vector with the correct expected output
• Verify the test passes with the updated values
• Ensure all other test vectors are still valid

Priority

Medium - This affects test coverage and validation of the implementation.

Labels

• enhancement
• testing
• poseidon2