Apply argument comment lint across codex-rs (#14652)

## 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

---

* -> #14652
* #14651

codex-rs/exec/src/event_processor_with_jsonl_output.rs

@@ -495,7 +495,7 @@ impl EventProcessorWithJsonOutput {
                 .iter()
                 .map(ToString::to_string)
                 .collect(),
-            None,
+            /*prompt*/ None,
         )
     }
 
@@ -526,7 +526,7 @@ impl EventProcessorWithJsonOutput {
             CollabTool::Wait,
             ev.sender_thread_id.to_string(),
             receiver_thread_ids,
-            None,
+            /*prompt*/ None,
             agents_states,
             status,
         )
@@ -538,7 +538,7 @@ impl EventProcessorWithJsonOutput {
             CollabTool::CloseAgent,
             ev.sender_thread_id.to_string(),
             vec![ev.receiver_thread_id.to_string()],
-            None,
+            /*prompt*/ None,
         )
     }
 
@@ -555,7 +555,7 @@ impl EventProcessorWithJsonOutput {
             CollabTool::CloseAgent,
             ev.sender_thread_id.to_string(),
             vec![receiver_id.clone()],
-            None,
+            /*prompt*/ None,
             [(receiver_id, agent_state)].into_iter().collect(),
             status,
         )