Create Extract Background service project

#9
- [x] Create project template

- [x] Create event class

Resolved Rabbitmq networking connection problem by adding the correct rabbit mq host name from the extractor background task#s config file.
"EventBusConnection": "rabbitmq"

The issue mentions creating an 'Extract Background service project' and resolving a RabbitMQ connection by setting 'EventBusConnection' to 'rabbitmq' in a config file. Look for existing background services or event bus implementations in the codebase, likely in a 'Services' or 'BackgroundTasks' directory. Check Docker Compose files for RabbitMQ service configuration. The work involves integrating a new service with the event bus, requiring understanding of the project's DDD and multi-service architecture.

Written by the indexing model from the issue text.