Make alerts responsive by updating the metrics every time an alerting cluster is written back to the database. This will reduce our lag between clearing alerts and the alert server going green from 15 minutes down to about 1 minute.
Make alerts responsive by updating the metrics every time an alerting cluster is written back to the database. This will reduce our lag between clearing alerts and the alert server going green from 15 minutes down to about 1 minute.

BUG=skia:

Review URL: https://codereview.chromium.org/838663002

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