Usage metrics data dictionary

[jdangerx]

Overview/Success criteria

We have all these metrics, and some folks have some hard-won context about what they all mean.

We don't need to create a full data dictionary here, but it's probably worth putting some documentation down so that people new to the usage metrics ETL & the dashboarding can learn:

• how to access the usage metrics in Superset
• how to find documentation about the column meanings for various log sources
  • S3
  • Kaggle
  • Zenodo
  • GitHub
  • ... anything else?

We don't want to spend a ton of time on this, so a best-effort set of documentation on the repo wiki with ~1-2 hours of work seems totally fine.

Next steps

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1. S3 metrics column documentation in wiki