Remove duplicates from tags in DB

[mattfullerton]

After the merge of groups + tags (done quickly with GSheets formula), there are duplicates. This is probably more easily dealt with with a quick python script once we move to CSV (Issue #35). Or we could add it to the model code and do it at (re)load.

[rufuspollock]

Definitely want to do in the DB. Think we can probably do by hand (or script if needed).

@gjlawran would you be up for helping on this?

[gjlawran]

@rgrp @mattfullerton absolutely. I will remove the duplicates from the tags field. Likely by script + manual edits.

[gjlawran]

All duplicates removed.