Resolves merge conflicts between Phase 4.2 comprehensive test suite and the test coverage improvement branch: - config_test.go: take PR's better table-driven tests + keep main's extra tests - coverage_test.go: keep main's Phase 4.2 comprehensive tests Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: multica-agent <github@multica.ai>