- stream_get now reads error responses before calling _raise_for_status
(httpx raises on .json()/.text access inside an unread stream context)
- Raise read timeout to 120s (was 30s) so generation streams don't timeout
- Document "generation" as a valid category for fable_get_app_logs
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>