189b9a6d35
- Buffered `start` events until after the first replay-unsafe event and replayed them on auth failure. - Retried stream requests with refreshed credentials when `onAuthError` returned a new key for gateway and pi-native. - Added 401 error-status parsing for assistant errors and updated stream-auth tests for start+401 retry behavior. - Added `AuthRetryFailure` helpers and status extraction types to propagate auth-retry metadata through stream attempts.