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/models-manager/src/manager.rs

@@ -107,7 +107,7 @@ pub trait ModelsManager: fmt::Debug + Send + Sync {
 
     /// Build picker-ready presets from the active catalog snapshot.
     fn build_available_models(&self, mut remote_models: Vec<ModelInfo>) -> Vec<ModelPreset> {
-        remote_models.sort_by(|a, b| a.priority.cmp(&b.priority));
+        remote_models.sort_by_key(|model| model.priority);
 
         let mut presets: Vec<ModelPreset> = remote_models.into_iter().map(Into::into).collect();
         let uses_codex_backend = self

codex-rs/models-manager/src/test_support.rs

@@ -14,7 +14,7 @@ pub fn get_model_offline_for_tests(model: Option<&str>) -> String {
         return model.to_string();
     }
     let mut response = bundled_models_response().unwrap_or_default();
-    response.models.sort_by(|a, b| a.priority.cmp(&b.priority));
+    response.models.sort_by_key(|model| model.priority);
     let presets: Vec<ModelPreset> = response.models.into_iter().map(Into::into).collect();
     presets
         .iter()