feat(core): Implement DDD, CQRS, and Event Sourcing architecture
- Add project README and Composer configuration with PSR-4 autoloading - Implement domain layer with AggregateRoot base class for event sourcing - Create Carrier aggregate with CarrierRegistered domain event - Add application layer with RegisterCarrierCommand and RegisterCarrierHandler - Implement infrastructure layer with EventStore interface and CassandraEventStore - Add CommandBus and Router for request handling and routing - Create demo test file to showcase carrier registration workflow - Establish foundation for event-driven architecture with Cassandra persistence
This commit is contained in: