- Updated SonarQube action from kitabisa/sonarqube-action@v1.2.0 to sonarsource/sonarqube-scan-action@v4
- Official action uses Java 17, compatible with SonarQube 25.10
- Added sonar-project.properties with Terraform-specific exclusions
- Fixes: java.lang.UnsupportedClassVersionError (class file version 61.0 vs 55.0)