Add CPU ID label to custom context tags

Author: nsavoire

reporter/datadog_reporter.go

@@ -503,6 +503,7 @@ func createTags(userTags Tags, runtimeTag, version string, splitByServiceEnabled
 	tags := append(Tags{}, userTags...)
 
 	customContextTagKey := "ddprof.custom_ctx"
+	tags = append(tags, MakeTag(customContextTagKey, pprof.CPUIDLabel))
 	if !splitByServiceEnabled {
 		tags = append(tags,
 			MakeTag(customContextTagKey, "container_id"),

reporter/pprof/profile_builder.go

@@ -18,6 +18,10 @@ import (
 	samples "github.com/DataDog/dd-otel-host-profiler/reporter/samples"
 )
 
+const (
+	CPUIDLabel = "cpu.logical_number"
+)
+
 type Config struct {
 	Start                       time.Time
 	End                         time.Time
@@ -256,7 +260,7 @@ func addTraceLabels(labels map[string][]string, i samples.TraceAndMetaKey, proce
 		labels["process name"] = append(labels["process name"], processName)
 	}
 
-	labels["cpu.logical_number"] = append(labels["cpu.logical_number"], strconv.Itoa(int(i.CPU)))
+	labels[CPUIDLabel] = append(labels[CPUIDLabel], strconv.Itoa(int(i.CPU)))
 
 	containerMetadata := processMeta.ContainerMetadata
 	if containerMetadata.PodName != "" {