Size of tables registered tables in use by queries

Example Metric Record:

json
{
   "#repo" : "humio-metrics",
   "#type" : "metrics",
   "@host" : "41",
   "@id" : "Y3hehJLWIC08HrPzpGr145yP_7471_1113_1749373097",
   "@ingesttimestamp" : "1749373097864",
   "@timestamp" : 1749373097787,
   "@timestamp.nanos" : "0",
   "@timezone" : "UTC",
   "name" : "dynamic-table-reference-controller-size-of-tables-in-use-by-queries",
   "type" : "GAUGE",
   "value" : "0"
}