- Remove Node.js 14 from test matrix (reached EOL 2023-04-30)
- Set codecov fail_ci_if_error to false to prevent rate limit failures
- Resolves CI infrastructure issues documented in CI_FIX_GUIDE.md
Node.js 14 is no longer supported as current dependencies (xo@0.57)
require Node.js 15+ for ES2021 features (logical assignment operators).
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>