Uprev Rust toolchain pins to 1.95.0 (#24684)

## Summary
- Bump the workspace Rust toolchain from `1.93.0` to `1.95.0` across
Cargo, Bazel, CI, release workflows, devcontainers, and the Codex
environment config.
- Refresh `MODULE.bazel.lock` so the Bazel Rust toolchain artifacts
match the new version.
- Leave purpose-specific toolchains unchanged, including the
`argument-comment-lint` nightly and the upstream `rusty_v8` `1.91.0`
build pin.
- Includes fixes for new lints from `just fix` and a few codex-authored
fixes for lints without a suggestion.

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

@@ -559,10 +559,8 @@ async fn summarize_context_three_requests_and_instructions() {
             RolloutItem::TurnContext(_) => {
                 regular_turn_context_count += 1;
             }
-            RolloutItem::Compacted(ci) => {
-                if ci.message == expected_summary_message {
-                    saw_compacted_summary = true;
-                }
+            RolloutItem::Compacted(ci) if ci.message == expected_summary_message => {
+                saw_compacted_summary = true;
             }
             _ => {}
         }

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

@@ -110,7 +110,7 @@ fn canonical_json(value: &Value) -> Value {
     match value {
         Value::Object(map) => {
             let mut entries = map.iter().collect::<Vec<_>>();
-            entries.sort_by(|(left_key, _), (right_key, _)| left_key.cmp(right_key));
+            entries.sort_by_key(|(left_key, _)| *left_key);
             Value::Object(
                 entries
                     .into_iter()

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

@@ -1047,7 +1047,7 @@ fn canonical_json(value: &Value) -> Value {
     match value {
         Value::Object(map) => {
             let mut entries = map.iter().collect::<Vec<_>>();
-            entries.sort_by(|(left_key, _), (right_key, _)| left_key.cmp(right_key));
+            entries.sort_by_key(|(left_key, _)| *left_key);
             Value::Object(
                 entries
                     .into_iter()

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

@@ -638,10 +638,8 @@ async fn snapshot_rollback_followup_turn_trims_context_updates() -> Result<()> {
 
 fn normalize_line_endings(value: &mut Value) {
     match value {
-        Value::String(text) => {
-            if text.contains('\r') {
-                *text = text.replace("\r\n", "\n").replace('\r', "\n");
-            }
+        Value::String(text) if text.contains('\r') => {
+            *text = text.replace("\r\n", "\n").replace('\r', "\n");
         }
         Value::Array(items) => {
             for item in items {

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

@@ -1835,15 +1835,14 @@ async fn conversation_startup_context_current_thread_selects_many_turns_by_budge
         "head detail ".repeat(120),
         "tail detail ".repeat(170),
     );
-    let mut user_turns = (1..=7)
+    let user_turns = (1..=7)
         .map(|index| {
             format!(
                 "short-turn-{index}-start {} short-turn-{index}-end",
                 "detail ".repeat(86)
             )
         })
-        .collect::<Vec<_>>();
-    user_turns.push(latest_long_user_turn.clone());
+        .chain([latest_long_user_turn.clone()]);
 
     let mut builder = test_codex().with_config({
         let realtime_base_url = realtime_server.uri().to_string();
@@ -1858,7 +1857,6 @@ async fn conversation_startup_context_current_thread_selects_many_turns_by_budge
     // end-to-end startup-context test without paying for a model turn per
     // fixture entry in platform CI.
     let history = user_turns
-        .into_iter()
         .enumerate()
         .flat_map(|(index, user_turn)| {
             let turn_number = index + 1;