As DevOps Engineer
I want to add new custom query to datadog database monitoring
so that I can monitor custom metric that based on custom query that datadog does not send by default.
In addition, I would like to provide some documentation regarding of running custom queries on datadog
https://docs.datadoghq.com/database_monitoring/setup_postgres/selfhosted/?tab=postgres15#running-custom-queries

This is quite important for us so we could remove any custom implementation to get custom metric via custom query.