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/tui_app_server/src/multi_agents.rs

@@ -224,7 +224,7 @@ pub(crate) fn interaction_end(ev: CollabAgentInteractionEndEvent) -> PlainHistor
             nickname: receiver_agent_nickname.as_deref(),
             role: receiver_agent_role.as_deref(),
         },
-        None,
+        /*spawn_request*/ None,
     );
 
     let mut details = Vec::new();
@@ -244,7 +244,11 @@ pub(crate) fn waiting_begin(ev: CollabWaitingBeginEvent) -> PlainHistoryCell {
     let receiver_agents = merge_wait_receivers(&receiver_thread_ids, receiver_agents);
 
     let title = match receiver_agents.as_slice() {
-        [receiver] => title_with_agent("Waiting for", agent_label_from_ref(receiver), None),
+        [receiver] => title_with_agent(
+            "Waiting for",
+            agent_label_from_ref(receiver),
+            /*spawn_request*/ None,
+        ),
         [] => title_text("Waiting for agents"),
         _ => title_text(format!("Waiting for {} agents", receiver_agents.len())),
     };
@@ -290,7 +294,7 @@ pub(crate) fn close_end(ev: CollabCloseEndEvent) -> PlainHistoryCell {
                 nickname: receiver_agent_nickname.as_deref(),
                 role: receiver_agent_role.as_deref(),
             },
-            None,
+            /*spawn_request*/ None,
         ),
         Vec::new(),
     )
@@ -313,7 +317,7 @@ pub(crate) fn resume_begin(ev: CollabResumeBeginEvent) -> PlainHistoryCell {
                 nickname: receiver_agent_nickname.as_deref(),
                 role: receiver_agent_role.as_deref(),
             },
-            None,
+            /*spawn_request*/ None,
         ),
         Vec::new(),
     )
@@ -337,7 +341,7 @@ pub(crate) fn resume_end(ev: CollabResumeEndEvent) -> PlainHistoryCell {
                 nickname: receiver_agent_nickname.as_deref(),
                 role: receiver_agent_role.as_deref(),
             },
-            None,
+            /*spawn_request*/ None,
         ),
         vec![status_summary_line(&status)],
     )