Total size of pending upload to Bucket Storage for segment files that are not known to have more than one replica in the local cluster

Example Metric Record:

json
{
   "#repo" : "humio-metrics",
   "#type" : "metrics",
   "@host" : "71",
   "@id" : "E4JsyIw1U6bFCIC4H9anKvRC_3584_726_1764664219",
   "@ingesttimestamp" : "1764664219553",
   "@timestamp" : 1764664219516,
   "@timestamp.nanos" : "0",
   "@timezone" : "UTC",
   "name" : "bucket-storage-pending-upload-underreplicated",
   "type" : "GAUGE",
   "value" : "0"
}