- Add OptionsContract dataclass with 21 fields (Greeks, IV, market data)
- Add OptionsChain dataclass with to_dataframe() and filter_by_dte() methods
- Add get_options_expirations() with DTE filtering and Pitfall 5 normalization
- Add get_options_chain() returning string for LLM tool consumption
- Add get_options_chain_structured() returning OptionsChain for programmatic use
- Add session cache with clear_options_cache() and Pitfall 2 normalization
- Always request greeks=true per D-05
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Filipe Salvio