langgraph-checkpoint 4.0.3 calls Reviver() at module load without
allowed_objects, printing a pending-deprecation warning at every
CLI start. The upstream patch is merged
(langchain-ai/langgraph#7743) but not released; no app-side seam
fixes it. Install a surgical filter in package init (message regex
+ PendingDeprecationWarning category). Remove when we bump past
langgraph-checkpoint 4.0.3.
- OpenAI: add GPT-5.4, GPT-5.4 Pro; remove o-series and legacy GPT-4o
- Anthropic: add Claude Opus 4.6, Sonnet 4.6; remove legacy 4.1/4.0/3.x
- Google: add Gemini 3.1 Pro, 3.1 Flash Lite; remove deprecated
gemini-3-pro-preview and Gemini 2.0 series
- xAI: clean up model list to match current API
- Simplify UnifiedChatOpenAI GPT-5 temperature handling
- Add missing tradingagents/__init__.py (fixes pip install building)