Update the updatedAt field for a batchSpecification every time it is scheduled for scraping

Fixed some test edge cases

Fixed the BatchManager/Batch tests

Refactored the domain classes so that it does not embed Akka code

Adjusting MongoDB/Postgres config

BatchListingProjection created, stored in MongoDB

Adding the full batchSpecification to the Batch, preparing for the projection

Adding the pauseBatchSpecification grpc endpoint

Handling failure response on addBatchSpecification

Using grpc instead of http for the BatchSpecification service

Introducing akka-grpc

Add files via upload

Add files via upload

Tagging the batch events, some renaming

Code formatting