- Remove configure_unattended_upgrades call at end of file - Script is now library-only, called from setup.sh where DISTRO is set - Prevents 'DISTRO: unbound variable' error when run standalone
- Add lib/detection.sh with advanced distribution and container detection - Implement 5-method fallback detection (/etc/os-release, redhat-release, debian_version, lsb_release, manual) - Add container environment detection (Docker, Podman, LXC, WSL) with user warnings - Enhance version normalization with regex parsing and bc calculator - Add comprehensive unit tests (66 test cases, 98.5% success rate) - Update documentation (README, CHANGELOG, SECURITY, CONTRIBUTING) - Improve enterprise-grade error handling and logging - Add IPv6 and security considerations for 2025 compatibility