chore: clean up argument-comment lint and roll out all-target CI on macOS (#16054)

## Why

`argument-comment-lint` was green in CI even though the repo still had
many uncommented literal arguments. The main gap was target coverage:
the repo wrapper did not force Cargo to inspect test-only call sites, so
examples like the `latest_session_lookup_params(true, ...)` tests in
`codex-rs/tui_app_server/src/lib.rs` never entered the blocking CI path.

This change cleans up the existing backlog, makes the default repo lint
path cover all Cargo targets, and starts rolling that stricter CI
enforcement out on the platform where it is currently validated.

## What changed

- mechanically fixed existing `argument-comment-lint` violations across
the `codex-rs` workspace, including tests, examples, and benches
- updated `tools/argument-comment-lint/run-prebuilt-linter.sh` and
`tools/argument-comment-lint/run.sh` so non-`--fix` runs default to
`--all-targets` unless the caller explicitly narrows the target set
- fixed both wrappers so forwarded cargo arguments after `--` are
preserved with a single separator
- documented the new default behavior in
`tools/argument-comment-lint/README.md`
- updated `rust-ci` so the macOS lint lane keeps the plain wrapper
invocation and therefore enforces `--all-targets`, while Linux and
Windows temporarily pass `-- --lib --bins`

That temporary CI split keeps the stricter all-targets check where it is
already cleaned up, while leaving room to finish the remaining Linux-
and Windows-specific target-gated cleanup before enabling
`--all-targets` on those runners. The Linux and Windows failures on the
intermediate revision were caused by the wrapper forwarding bug, not by
additional lint findings in those lanes.

## Validation

- `bash -n tools/argument-comment-lint/run.sh`
- `bash -n tools/argument-comment-lint/run-prebuilt-linter.sh`
- shell-level wrapper forwarding check for `-- --lib --bins`
- shell-level wrapper forwarding check for `-- --tests`
- `just argument-comment-lint`
- `cargo test` in `tools/argument-comment-lint`
- `cargo test -p codex-terminal-detection`

## Follow-up

- Clean up remaining Linux-only target-gated callsites, then switch the
Linux lint lane back to the plain wrapper invocation.
- Clean up remaining Windows-only target-gated callsites, then switch
the Windows lint lane back to the plain wrapper invocation.

codex-rs/core/tests/suite/review.rs

@@ -70,7 +70,8 @@ async fn review_op_emits_lifecycle_and_review_output() {
         ]"#;
     let review_json_escaped = serde_json::to_string(&review_json).unwrap();
     let sse_raw = sse_template.replace("__REVIEW__", &review_json_escaped);
-    let (server, _request_log) = start_responses_server_with_sse(&sse_raw, 1).await;
+    let (server, _request_log) =
+        start_responses_server_with_sse(&sse_raw, /*expected_requests*/ 1).await;
     let codex_home = Arc::new(TempDir::new().unwrap());
     let codex = new_conversation_for_server(&server, codex_home.clone(), |_| {}).await;
 
@@ -192,7 +193,8 @@ async fn review_op_with_plain_text_emits_review_fallback() {
         }},
         {"type":"response.completed", "response": {"id": "__ID__"}}
     ]"#;
-    let (server, _request_log) = start_responses_server_with_sse(sse_raw, 1).await;
+    let (server, _request_log) =
+        start_responses_server_with_sse(sse_raw, /*expected_requests*/ 1).await;
     let codex_home = Arc::new(TempDir::new().unwrap());
     let codex = new_conversation_for_server(&server, codex_home.clone(), |_| {}).await;
 
@@ -253,7 +255,8 @@ async fn review_filters_agent_message_related_events() {
         }},
         {"type":"response.completed", "response": {"id": "__ID__"}}
     ]"#;
-    let (server, _request_log) = start_responses_server_with_sse(sse_raw, 1).await;
+    let (server, _request_log) =
+        start_responses_server_with_sse(sse_raw, /*expected_requests*/ 1).await;
     let codex_home = Arc::new(TempDir::new().unwrap());
     let codex = new_conversation_for_server(&server, codex_home.clone(), |_| {}).await;
 
@@ -335,7 +338,8 @@ async fn review_does_not_emit_agent_message_on_structured_output() {
         ]"#;
     let review_json_escaped = serde_json::to_string(&review_json).unwrap();
     let sse_raw = sse_template.replace("__REVIEW__", &review_json_escaped);
-    let (server, _request_log) = start_responses_server_with_sse(&sse_raw, 1).await;
+    let (server, _request_log) =
+        start_responses_server_with_sse(&sse_raw, /*expected_requests*/ 1).await;
     let codex_home = Arc::new(TempDir::new().unwrap());
     let codex = new_conversation_for_server(&server, codex_home.clone(), |_| {}).await;
 
@@ -390,7 +394,8 @@ async fn review_uses_custom_review_model_from_config() {
     let sse_raw = r#"[
         {"type":"response.completed", "response": {"id": "__ID__"}}
     ]"#;
-    let (server, request_log) = start_responses_server_with_sse(sse_raw, 1).await;
+    let (server, request_log) =
+        start_responses_server_with_sse(sse_raw, /*expected_requests*/ 1).await;
     let codex_home = Arc::new(TempDir::new().unwrap());
     // Choose a review model different from the main model; ensure it is used.
     let codex = new_conversation_for_server(&server, codex_home.clone(), |cfg| {
@@ -444,7 +449,8 @@ async fn review_uses_session_model_when_review_model_unset() {
     let sse_raw = r#"[
         {"type":"response.completed", "response": {"id": "__ID__"}}
     ]"#;
-    let (server, request_log) = start_responses_server_with_sse(sse_raw, 1).await;
+    let (server, request_log) =
+        start_responses_server_with_sse(sse_raw, /*expected_requests*/ 1).await;
     let codex_home = Arc::new(TempDir::new().unwrap());
     let codex = new_conversation_for_server(&server, codex_home.clone(), |cfg| {
         cfg.model = Some("gpt-4.1".to_string());
@@ -498,7 +504,8 @@ async fn review_input_isolated_from_parent_history() {
     let sse_raw = r#"[
         {"type":"response.completed", "response": {"id": "__ID__"}}
     ]"#;
-    let (server, request_log) = start_responses_server_with_sse(sse_raw, 1).await;
+    let (server, request_log) =
+        start_responses_server_with_sse(sse_raw, /*expected_requests*/ 1).await;
 
     // Seed a parent session history via resume file with both user + assistant items.
     let codex_home = Arc::new(TempDir::new().unwrap());
@@ -681,7 +688,8 @@ async fn review_history_surfaces_in_parent_session() {
         }},
         {"type":"response.completed", "response": {"id": "__ID__"}}
     ]"#;
-    let (server, request_log) = start_responses_server_with_sse(sse_raw, 2).await;
+    let (server, request_log) =
+        start_responses_server_with_sse(sse_raw, /*expected_requests*/ 2).await;
     let codex_home = Arc::new(TempDir::new().unwrap());
     let codex = new_conversation_for_server(&server, codex_home.clone(), |_| {}).await;
 
@@ -773,7 +781,8 @@ async fn review_uses_overridden_cwd_for_base_branch_merge_base() {
     skip_if_no_network!();
 
     let sse_raw = r#"[{"type":"response.completed", "response": {"id": "__ID__"}}]"#;
-    let (server, request_log) = start_responses_server_with_sse(sse_raw, 1).await;
+    let (server, request_log) =
+        start_responses_server_with_sse(sse_raw, /*expected_requests*/ 1).await;
 
     let initial_cwd = TempDir::new().unwrap();