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>

pkg/archive/parquet/writer_test.go

@@ -57,7 +57,7 @@ func makeTestJob(jobID int64) (*schema.Job, *schema.JobData) {
 		},
 	}
 
-	data := schema.JobData{
+	data := schema.JobData{Metrics: map[string]schema.ScopedMetrics{
 		"cpu_load": {
 			schema.MetricScopeNode: &schema.JobMetric{
 				Unit:     schema.Unit{Base: ""},
@@ -70,7 +70,7 @@ func makeTestJob(jobID int64) (*schema.Job, *schema.JobData) {
 				},
 			},
 		},
-	}
+	}}
 
 	return meta, &data
 }
@@ -132,7 +132,7 @@ func TestJobToParquetRowConversion(t *testing.T) {
 	if err := json.Unmarshal(decompressed, &jobData); err != nil {
 		t.Fatalf("unmarshal metric data: %v", err)
 	}
-	if _, ok := jobData["cpu_load"]; !ok {
+	if _, ok := jobData.Metrics["cpu_load"]; !ok {
 		t.Error("metric data missing cpu_load key")
 	}
 }