Workspace lints and disallow unwrap (#855)

Sets submodules to use workspace lints. Added denying unwrap as a
workspace level lint, which found a couple of cases where we could have
propagated errors. Also manually labeled ones that were fine by my eye.

codex-rs/core/Cargo.toml

@@ -7,6 +7,9 @@ edition = "2024"
 name = "codex_core"
 path = "src/lib.rs"
 
+[lints]
+workspace = true
+
 [dependencies]
 anyhow = "1"
 async-channel = "2.3.1"

codex-rs/core/src/codex.rs

@@ -1,3 +1,6 @@
+// Poisoned mutex should fail the program
+#![allow(clippy::unwrap_used)]
+
 use std::collections::HashMap;
 use std::collections::HashSet;
 use std::path::Path;

codex-rs/core/src/exec.rs

@@ -351,5 +351,6 @@ fn synthetic_exit_status(code: i32) -> ExitStatus {
 #[cfg(windows)]
 fn synthetic_exit_status(code: i32) -> ExitStatus {
     use std::os::windows::process::ExitStatusExt;
+    #[expect(clippy::unwrap_used)]
     std::process::ExitStatus::from_raw(code.try_into().unwrap())
 }

codex-rs/core/src/rollout.rs

@@ -166,7 +166,9 @@ fn create_log_file() -> std::io::Result<LogFileInfo> {
 
     // Custom format for YYYY-MM-DD.
     let format: &[FormatItem] = format_description!("[year]-[month]-[day]");
-    let date_str = timestamp.format(format).unwrap();
+    let date_str = timestamp
+        .format(format)
+        .map_err(|e| IoError::new(ErrorKind::Other, format!("failed to format timestamp: {e}")))?;
 
     let filename = format!("rollout-{date_str}-{session_id}.jsonl");