Publish Order Created Event using Outbox Pattern

[heymaaz]

• Explain the challenge of implementing "database operations and sending a message" as a single atomic operation.
• Explain how "Outbox Pattern" tries to solve this problem.
• Create order_events table, Entity, Repository, Service
• Create order event models
• Implement Order Event Mapper
• Store Order events into order_events table
• Create a Scheduled Job to publish order events to RabbitMQ