BUG: add ValueError to f_proc

There can be an issue that data loading works but an issue arises during interpolation (e.g. window is too long). Therefore add ValueError to the exception list for invalid stations.

added To Do bug labels

Comment, this is also required to be add to the transformation call of the data handler!

created merge request !200 (merged) to address this issue

mentioned in merge request !200 (merged)

mentioned in commit a86928c0

added .done label and removed To Do label

added merged in Develop label and removed .done label

closed with merge request !225 (merged)

closed with commit a86928c0

mentioned in commit cf6bca9d