Merge branch 'feat/565-add-metric-tooltip' into metric-store-tickets

Resolve conflicts in the generated GraphQL code by regenerating it against
the merged schema. cc-lib v2.13.0 adds Tooltip to schema.MetricConfig and
schema.GlobalMetricListItem, so gqlgen now binds the tooltip field directly
and the hand-written globalMetricListItem/metricConfig resolvers introduced
on the tooltip branch are no longer needed.

Also migrate to the cc-lib v2.13.0 metric container types, which changed
from bare maps to structs carrying array-valued metric groups:

  schema.JobData          map -> {Metrics, Groups}
  schema.ScopedJobStats   map -> {Metrics, Groups}
  job.Statistics          map -> schema.JobStatisticsSet{Metrics, Groups}

Callers index .Metrics, return the zero struct instead of nil, and
deepCopy/DecodeJobStats now also carry the Groups payload through.
archive.GetStatistics returns the full JobStatisticsSet so group
statistics survive the round trip.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

web/frontend/src/Systems.root.svelte

@@ -63,8 +63,9 @@
   let pendingHostnameFilter = $state("");
   let isMetricsSelectionOpen = $state(false);
 
-  /* Derived Init Return */
+  /* Derived Init Returns */
   const thisInit = $derived($initq?.data ? true : false);
+  const maxSubClusters = $derived($initq?.data?.clusters?.find((c) => c.name == cluster)?.subClusters?.length || 0);
 
   /* Derived States */
   const ccconfig = $derived(thisInit ? getContext("cc-config") : null);
@@ -268,6 +269,7 @@
     {cluster}
     {subCluster}
     {globalMetrics}
+    maxSubClusters={subCluster? null: maxSubClusters}
     configName="nodeList_selectedMetrics"
     applyMetrics={(newMetrics) => 
       selectedMetrics = [...newMetrics]