fix(codex): harden streaming timeouts + Responses terminal events

Raise stall/connect timeouts to 60s (configurable per-provider), accept
codex response.done, and always emit a terminal response.failed + [DONE]
for Responses passthrough when a stream closes, stalls, or aborts before
a terminal event — preventing codex clients from hanging.

Co-authored-by: jonathanli12 <jonathanli12@users.noreply.github.com>
Co-authored-by: rifuki <rifuki@users.noreply.github.com>
Co-authored-by: nguyenha935 <nguyenha935@users.noreply.github.com>
Co-authored-by: trananhtung <trananhtung@users.noreply.github.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/config/providers.js

@@ -71,8 +71,8 @@ export const PROVIDERS = {
     baseUrl: "https://chatgpt.com/backend-api/codex/responses",
     format: "openai-responses",
     headers: {
-      "originator": "codex-cli",
-      "User-Agent": "codex-cli/1.0.18 (macOS; arm64)"
+      "originator": "codex_cli_rs",
+      "User-Agent": "codex_cli_rs/0.136.0"
     },
     clientId: "app_EMoamEEZ73f0CkXaXp7hrann",
     tokenUrl: "https://auth.openai.com/oauth/token"