Alex Kremer

## Summary For #1594 Rewrite the extractor using ranges and AsyncFramework. Note that there are going to be multiple extractors operating at the same time. Make it testable and cover...

## Summary Part of #1594 Create a layer of abstraction for writer handover process. The logic does not yet need to be implemented in any different way from the existing...

## Summary Many parts of the ETL need improvements. Separate issues will be created and linked here for each sufficiently big component. ### Subtasks 1. Node awareness abstraction - #1595...