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/debug-client/src/client.rs

@@ -312,10 +312,8 @@ impl AppServerClient {
             };
 
             match message {
-                JSONRPCMessage::Response(response) => {
-                    if &response.id == request_id {
-                        return Ok(response);
-                    }
+                JSONRPCMessage::Response(response) if &response.id == request_id => {
+                    return Ok(response);
                 }
                 JSONRPCMessage::Request(request) => {
                     let _ = handle_server_request(request, &stdin);