Created feature_flags schema with:
- flags table: Global feature flag definitions
- user_flags table: User-level overrides
- evaluations table: Evaluation history for analytics
- evaluate_flag() function: PL/pgSQL evaluation with priorities
Features:
- Percentage-based rollout
- User override support
- Targeting rules (plan, role)
- Expiration support
- Initial flags for trading platform
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
