The actuator endpoint uses the application's management port, which is a new environment variable

removed legacy endpoint as frontend moved to new endpoints too

added new api endpoints to get KPIs based upon the repository long id and not the repository id created in the db

Reworked KPI calculation. Added first error handling and tests. Added new API query system. ATTENTION: ORT URL currently hardcoded for repository id 106 due to test setup

further refactoring