fix: clean up remaining Windows argument-comment-lint violations (#16071)

## Why

The initial `argument-comment-lint` rollout left Windows on
default-target coverage because there were still Windows-only callsites
failing under `--all-targets`. This follow-up cleans up those remaining
Windows-specific violations so the Windows CI lane can enforce the same
stricter coverage, leaving Linux as the remaining platform-specific
follow-up.

## What changed

- switched the Windows `rust-ci` argument-comment-lint step back to the
default wrapper invocation so it runs full-target coverage again
- added the required `/*param_name*/` annotations at Windows-gated
literal callsites in:
  - `codex-rs/windows-sandbox-rs/src/lib.rs`
  - `codex-rs/windows-sandbox-rs/src/elevated_impl.rs`
  - `codex-rs/tui_app_server/src/multi_agents.rs`
  - `codex-rs/network-proxy/src/proxy.rs`

## Validation

- Windows `argument comment lint` CI on this PR