test: replace stub tests with comprehensive coverage
- build-iso_comprehensive_test.bats: Replace 'true' stub with 85+ tests
covering Docker build, live-build config, checksums, logging, errors
- run_test.bats: Replace '|| true' pattern with 42 tests covering all
commands, Docker integration, security requirements
- firewall_test.bats: Expand from 10 to 35+ tests covering WireGuard
parsing, nftables rules, security properties
💘 Generated with Crush
Assisted-by: GLM-4.7 via Crush <crush@charm.land>
8fbf3c0880