feat: update process ID for event handling (#7261)

codex-rs/Cargo.lock

@@ -1144,6 +1144,7 @@ dependencies = [
  "codex-apply-patch",
  "codex-arg0",
  "codex-async-utils",
+ "codex-core",
  "codex-execpolicy",
  "codex-file-search",
  "codex-git",