fix: display ranked choice ballot errors inline (#117) - #118

Action failed: The process '/opt/hostedtoolcache/sonar-scanner-cli/7.2.0.5079/linux-x64/bin/sonar-scanner' failed with exit code 1

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, SonarSource/sonarqube-scan-action@v6. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/