Fill System.graphite_detentions from a Table Config of *graphitemergetree Engine Tables

Why it matters

This feature enables the system.graphite_detentions table to be populated based on the configuration of *GraphiteMergeTree tables, improving visibility and monitoring capabilities for metrics detained by the Graphite MergeTree engine.

How to use it

Use tables created with the *GraphiteMergeTree engine. The system.graphite_detentions table will automatically be filled with relevant data from these tables, enabling inspection and analysis of Graphite metric detentions.