* Initial plan * Add multi-chain configuration and update hardhat config Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Add comprehensive tests and documentation for multi-chain support Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Add cross-chain verification support to API and registry service Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Add comprehensive multi-chain deployment documentation Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Fix chain ID example in documentation to avoid confusion Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> * Address code review feedback: add parameter validation and error logging Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: onnwee <211922112+onnwee@users.noreply.github.com>