Apply argument comment lint across codex-rs

[bolinfest]

Why

Once the repo-local lint exists, codex-rs needs to follow the checked-in convention and CI needs to keep it from drifting. This commit applies the fallback /*param*/ style consistently across existing positional literal call sites without changing those APIs.

The longer-term preference is still to avoid APIs that require comments by choosing clearer parameter types and call shapes. This PR is intentionally the mechanical follow-through for the places where the existing signatures stay in place.

After rebasing onto newer main, the rollout also had to cover newly introduced tui_app_server call sites. That made it clear the first cut of the CI job was too expensive for the common path: it was spending almost as much time installing cargo-dylint and re-testing the lint crate as a representative test job spends running product tests. The CI update keeps the full workspace enforcement but trims that extra overhead from ordinary codex-rs PRs.

What changed

• keep a dedicated argument_comment_lint job in rust-ci
• mechanically annotate remaining opaque positional literals across codex-rs with exact /*param*/ comments, including the rebased tui_app_server call sites that now fall under the lint
• keep the checked-in style aligned with the lint policy by using /*param*/ and leaving string and char literals uncommented
• cache cargo-dylint, dylint-link, and the relevant Cargo registry/git metadata in the lint job
• split changed-path detection so the lint crate's own cargo test step runs only when tools/argument-comment-lint/* or rust-ci.yml changes
• continue to run the repo wrapper over the codex-rs workspace, so product-code enforcement is unchanged

Most of the code changes in this commit are intentionally mechanical comment rewrites or insertions driven by the lint itself.

Verification

• ./tools/argument-comment-lint/run.sh --workspace
• cargo test -p codex-tui-app-server -p codex-tui
• parsed .github/workflows/rust-ci.yml locally with PyYAML

---

• -> Apply argument comment lint across codex-rs #14652
• Add argument-comment Dylint runner #14651

[joshka-oai]

This seems like one example of where this is a little overeager - it's the only place I found in reading a majority of the fixes though, so no big deal (and not worth fixing).