wubloader/sheetsync
Mike Lang 89a9e5554c sheetsync: Record counts of rows in the DB, segmented by various columns
This lets us view a number of useful graphs in dashboards, eg. rows by state,
errored rows, rows by day, rows by category, meltdowns per day, fraction of
events that are poster moments by category.

Sheetsync was the natural place to do this since it was already periodically scanning
the entire events table.
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sheetsync sheetsync: Record counts of rows in the DB, segmented by various columns
Dockerfile Refactor dockerfiles for more shared layers
setup.py sheet-sync: Some fixes