feat: SparseCalldataSegmentLib optimization

[jaypaik]

Returning calldata instead of memory.

[octane-security-app]

Summary by Octane

New Contracts

• EmptyCalldataSlice.sol: The smart contract provides a function to return an empty bytes calldata slice using inline assembly.

Updated Contracts

• SparseCalldataSegmentLib.sol: The smart contract now returns a dedicated empty calldata slice instead of an empty string for non-matching segments.

---

🔗 Commit Hash: 3bb7980

[octane-security-app]

Overview

Octane AI analysis has finished. No vulnerabilities were found. Cheers! 🎉🎉🎉

---

🔗 Commit Hash: 3bb7980