Document praefect's separate_database_metrics setting
What does this MR do and why?
praefect['separate_database_metrics']
will put praefect metrics that run
queries on the database on a separate /db_metrics
endpoint so that
customers can choose to configure a slower scrape interval. Also, with a
multiple Praefect setup, customers can configure only one Praefect node
to query the database.
MR acceptance checklist
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I have evaluated the MR acceptance checklist for this MR.
Edited by John Cai