Release v0.1.6 - Thread-safety improvements with mutex protection for endpoint and connection (GAP-0200) - E2E interop tests for Python (aioquic), Go (quic-go), Rust (quinn), and Zig clients - Downgrade quic-go to v0.42.0 for Go 1.23 compatibility - CI pipeline improvements using pre-built artifacts - Ignore Go client binaries and test certificates in .gitignore - Pin CI catalog components to v1.9.5