- Change push and pull_request triggers from main branch to release branch
- This ensures CI/CD only runs on release branch for production builds

- Update upload-artifact from v3 to v4
- Update cache action from v3 to v4
- Keep actions/checkout@v4 (already up to date)
- Ensure all actions use latest stable versions

- Add musl-tools installation in setup job
- Update test job to install both musl target and musl-tools
- Fixes 'x86_64-linux-musl-gcc not found' error during compilation

- Remove the 'Check formatting' step that runs 'cargo fmt --check'
- Keep clippy checks for code quality but remove formatting enforcement

- Replace 'Verify musl target is installed' with 'Install musl target' in test job
- This ensures musl target is properly installed before building and testing

- Convert manual async functions to async fn syntax
- Replace assert_eq!(true/false, ...) with assert!(...) and assert!(!...)
- Fix useless vec warning by using array directly
- All tests continue to pass after optimizations