deduplicate olli and umwelt datalib #2
Description
Olli and Umwelt share a lot of overlapping code / logic for handling data cleaning, selections, etc. We should probably refactor this out into its own library that the two can share
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Olli and Umwelt share a lot of overlapping code / logic for handling data cleaning, selections, etc. We should probably refactor this out into its own library that the two can share