Additionally import BKG's VG250 dataset to enhance ARS-based bounding boxes.
I decided not to burden the README further and instead extended the CI job as a sort of executable documentation, c.f. umwelt-info/infrastruktur!47
Further, I added a post-processing step replacing overly broad bounding boxes by tighter region-based ones if available and not degenerate, i.e. point-like.
Closes #212 (closed)