Specify different time periods for different repos (backend)

[CYX22222003]

What feature(s) would you like to see in RepoSense

Specify different time periods for different repos before parsing and analyzing using the csv config files in the backend. This is a step to 'code portfolio' use case

This is currently not so urgent as the current implementation of 'trim timeline' feature will largely fulfill this requirements.

Is the feature request related to a problem?

#2217
#2283

If possible, describe the solution

Update the since and until after parsing and setup a flag to prevent overriding by the default date.

If applicable, describe alternatives you've considered

Additional context