- Add TestFormatPorts covering empty, single, and multiple ports - Add TestMain_VersionFlag_VerifiesOutput checking version variables - Add TestFlagParsing verifying CLI flag parsing behavior - Fix .gitignore to only ignore root-level binary, not cmd/ja4sentinel/ Implements testing.policy.requirements.test_skeletons from architecture.yml Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>