- Add Reasoning/ReasoningContent fields to ResetDataMessage struct
- Wire reasoning extraction to TaskResponse.Reasoning in ExecuteTask
- Fix double /v1 in makeRequest and testConnection URL construction
- Handle both ResetData error formats (flat string and nested object)
- Update supported models to actual ResetData beta inventory
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>