🐛 Fix AncestryDNA processing
🐛 Fix AncestryDNA processing

Broken for a couple months due to incomplete refactoring.

This update also adds orig_file_hash (as done for 23andMe processing),
to avoid redundant reprocessing of the same uploaded data file.

PersonalGenomesOrg/open-humans-data-processing,OpenHumans/open-humans-data-processing