fix: use new exchange addresses

[ibruno]

Summary by cubic

Updated Amoy exchange contract addresses so the order builder signs against the latest deployments. Ensures signatures verify on-chain and prevents failed orders on Amoy.

• Bug Fixes

  • Adjusted test expectations (struct hashes and signatures) to reflect the new EIP-712 domain from the updated contracts.
  • Affected APIs: order builder signature generation (build_order_signature, build_signed_order). No method or runtime changes; outputs differ on Amoy due to the new domain.
  • Performance: no impact.

• Migration

  • Update any Amoy config to use:
    • exchange: 0xaCd95F4F42322c7bE215C170362EEc57Ef4E78c2
    • negRiskExchange: 0x961d3230B3BBdb2592D20fa34dBD12Fa19240603

^{Written for commit a3e9e46. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}