Phase 2: New Features

[iamaestimo]

2.1 Additional Database Adapters

• Add MySQL/MariaDB JSON column support
• Add SQLite JSON1 extension support
• Add MongoDB adapter (optional stretch goal)
• Improve PostgreSQL jsonb performance with GIN indexes

2.2 Enhanced Designator System

• Add built-in OAuth/OIDC designator for JWT claims
• Add time-based designators (e.g., "only during business hours")
• Add IP/geo-location designators
• Add hierarchical designators (org → dept → team → user)

2.3 Developer Experience Improvements

• Add Rails generator for common setups
• Add rake tasks for ACL inspection/debugging
• Add Rails console helpers
• Improve error messages with actionable suggestions

Milestone: Release v2.0.0 with new features