3.0.0

• BREAKING CHANGES replaced MongoDB/Mongoose with PostgreSQL/Sequelize.
  Updated all models and handlers to work with new DB.
• Integrated Redis for caching and latency monitoring.
• Added new economy/timely command with cooldown and reward logic.
• Updated ping command to display DB and Redis latency.
• Improved overall code structure and modularity.
• Updated documentation to reflect the new architecture.
• Bumped version to 3.0.0.

Full Changelog: 2.0.0...3.0.0