Refactor database.py in scan_system.py

The following discussions from !384 (merged) should be addressed:

• @nbg-rwagensveld started a discussion:

  Is there a reason that this is handled as a dict and not as a dataclass?

• @nbg-rwagensveld started a discussion:

  It is a little bit weird to leave out the t in result.

• @nbg-rwagensveld started a discussion:

  Would it be possible to change the resul variable to a dataclass? This way we can add some type safety by returning a defined type (dataclass representing resul).