0.3.0: API Overhaul

This release overhauls the API.

Additionally, it

1. syncs the OpenAPI documentation of the API with the code
2. adds Flower (Celery monitoring service)
3. redefines Podman compose files to put better separations between different services
4. improves Docker file to improve Docker image build time
5. re-implements the periodic task for updating repos
6. adds numerous metadata extractions
7. improves basic search
8. adds numerous tests to achieve higher code coverage and code quality

0.2.0

Switched to Postgres, got registry-submit-urls, various other enhance…