CI / Security audit (RUSTSEC) (pull_request) Has been cancelled
CI / Build + Clippy + Test (pull_request) Has been cancelled
The self-hosted act_runner cannot reach github.com (network timeout on actions/checkout clone). Replace: - actions/checkout@v4 -> https://gitea.com/actions/checkout@v4 (3 sites) - actions/cache@v4 -> https://gitea.com/actions/cache@v4 - dtolnay/rust-toolchain@stable -> rustup toolchain install (inline run) gitea.com maintains official mirrors of the actions/* org. dtolnay's rust-toolchain is third-party (no gitea.com mirror), so replaced with a direct rustup invocation — the act_runner ubuntu image has rustup pre-installed. This unblocks CI which has been red since the original PR #26 was opened 6 weeks ago. No code changes.