[PR #37] p0-blocker: floating ^0.8.24 pragma on all three Solidity files

[obchain]

PR: #37 feat(contracts): full Aave + Venus + PancakeSwap liquidation flow
Commit: 54fe2bb
Files:

• contracts/src/CharonLiquidator.sol line 2
• contracts/src/interfaces/IVToken.sol line 2
• contracts/src/interfaces/ISwapRouter.sol line 2

Problem: All three files declare pragma solidity ^0.8.24. Caret allows any compiler from 0.8.24 to <0.9.0. foundry.toml pins solc_version = "0.8.24" so local builds deterministic, but any downstream consumer, audit tool, or Etherscan verification that does not inherit foundry config picks different compiler version, breaking reproducibility and ABI stability.

Impact: Non-reproducible builds. Etherscan source verification can fail or verify against different bytecode. Auditors testing with a later minor version may miss version-specific bugs.

Fix:

pragma solidity 0.8.24;

No caret. Matches solc_version in foundry.toml.

[obchain]

Fixed on feat/12-charon-liquidator-full in 4d4df17 — floating ^0.8.24 caret dropped from CharonLiquidator.sol and the five inline interfaces (IAaveV3Pool, IERC20, IFlashLoanSimpleReceiver, ISwapRouter, IVToken). Pragma now reads exactly pragma solidity 0.8.24; across the Solidity tree. Removes the risk of a future 0.8.x patch silently changing codegen, optimizer behaviour, or metadata hash for deployed bytecode.