The check job failed inside mise: mise.toml pulls the full dev toolchain
(tailwind, cargo-watch, flyctl, shellcheck, mvdan/sh, ...) and resolves most of
it via api.github.com, which 401s on the runner (no github.com token) ->
"Failed to install tools" -> exit 1.
CI only needs Rust for fmt/clippy/test, so restrict mise to `install_args: rust`
(rust resolves through rustup, no GitHub API). Also drop `sudo` (the runner
image runs as root and has none) and the redundant `rustup component add`
(mise installs rustfmt/clippy from mise.toml). Keep mold — the .cargo linker
flag requires it.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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