v0.5.0

Changelog

• 9d73b86 chore(deps): drop go-toml and cobra — module is now zero-dependency
• 02ab3b2 docs(ci): document coverage-gate crossbeam exception
• 8b6db3e feat(coverage): replace go-toml with stdlib TOML-subset parser
• 4f9b7f7 refactor(pkcov): replace cobra with stdlib flag dispatch
• 7626459 test(pkcov): cover flag dispatch and violation paths
• de8d0f6 test(pkcov): restore resolveModule trailing-slash unit test