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Due to inadequate pre-production verification, the deployment of #1118 resulted in service disruption for M-Lab BQ users.
The ideal approach is to have the bigquery-exporter bq_daily_discuss.sql query reference the unified views so that we can generate an alert. However, the unified views are very inefficient today, see: m-lab/prometheus-support/issues/894
This change adds a post-schema change, and pre-deployment verification of the project-local unified views.
This change is