* Respect data source in data gathering
* Update changelog
* optimize fetching from multiple data sources (#123)
* optimize fetching from multiple data sources
* improve performance by executing data gathering promises in parallel
* removed unused imports
* rename hasHistoricalData to canHandle
* Sort imports
* Clean up
Co-authored-by: Valentin Zickner <3200232+vzickner@users.noreply.github.com>
* Simplify initial project setup
* Added a validation for environment variables
* Added support for feature flags to simplify the initial project setup
* Add configuration service to test
* Optimize data gathering and exchange rate calculation (#14)
* Clean up changelog
Thomas