[PR #37] p0-blocker: evm_version=paris absent from foundry.toml — BSC miscompile

[obchain]

PR: #37 feat(contracts): full Aave + Venus + PancakeSwap liquidation flow
Commit: 54fe2bb
File: contracts/foundry.toml

Problem: foundry.toml sets solc_version = "0.8.24" but never sets evm_version. Without evm_version = "paris", solc defaults to "shanghai" which emits PUSH0 (opcode 0x5f). BSC mainnet does not support PUSH0. Compiled bytecode fails to deploy or silently mis-executes on BSC.

Impact: Deployment to BSC mainnet reverts at creation time. Every downstream integration — flash-loan callback, liquidation, swap — unreachable. Hard deploy blocker.

Fix: Add to [profile.default] in contracts/foundry.toml:

evm_version = "paris"

Inherited from #36 (#114) but must be resolved in this PR before any contract work lands.

[obchain]

Fixed on feat/12-charon-liquidator-full in f055350 — evm_version = "paris" set in contracts/foundry.toml. The ancestor-branch fix (#114 on feat/11) did not propagate to this branch, so the same patch was re-applied here. BSC rejects PUSH0; pinning to Paris keeps bytecode runnable on mainnet.