Feature: Additional to flag, introduce also source and definition as columns
Update on 15.03.2023: Source and definition informations are not yet part. Maybe introduce a column similar to the flag-column, to add these information. However, it might not be a data-efficient solution as these are strings. Maybe there are other solutions? E.g. the classes.parquet file and the classes DB-table already contain all of the information about source or definition (note: if they do not have them yet, it just has to be added in the function that gets the google-sheet).