[DEVCON-6293] add first timestamp

api/k8s/v1/k8s.proto

@@ -1303,6 +1303,8 @@ message Event {
 
   // last timestamp is the most recent time the event occurred (which can be different from the first time)
   int64 last_timestamp_millis = 12;
+
+  int64 first_timestamp_millis = 13;
 }
 
 message ListEventsRequest {

backend/service/k8s/event.go

@@ -53,16 +53,17 @@ func ProtoForEvent(cluster string, k8sEvent *corev1.Event) *k8sapiv1.Event {
 	// See https://pkg.go.dev/k8s.io/apimachinery/pkg/apis/meta/v1#ObjectMeta
 	// See also https://github.com/kubernetes/kubernetes/issues/90482 for a discussion on different timestamps.
 	return &k8sapiv1.Event{
-		Cluster:             clusterName,
-		Namespace:           k8sEvent.Namespace,
-		Name:                k8sEvent.Name,
-		Reason:              k8sEvent.Reason,
-		Description:         k8sEvent.Message,
-		InvolvedObjectName:  k8sEvent.InvolvedObject.Name,
-		Kind:                protoForObjectKind(k8sEvent.InvolvedObject.Kind),
-		CreationTimeMillis:  k8sEvent.GetObjectMeta().GetCreationTimestamp().UnixMilli(),
-		Type:                k8sEvent.Type,
-		LastTimestampMillis: k8sEvent.LastTimestamp.UnixMilli(),
+		Cluster:              clusterName,
+		Namespace:            k8sEvent.Namespace,
+		Name:                 k8sEvent.Name,
+		Reason:               k8sEvent.Reason,
+		Description:          k8sEvent.Message,
+		InvolvedObjectName:   k8sEvent.InvolvedObject.Name,
+		Kind:                 protoForObjectKind(k8sEvent.InvolvedObject.Kind),
+		CreationTimeMillis:   k8sEvent.GetObjectMeta().GetCreationTimestamp().UnixMilli(),
+		Type:                 k8sEvent.Type,
+		LastTimestampMillis:  k8sEvent.LastTimestamp.UnixMilli(),
+		FirstTimestampMillis: k8sEvent.FirstTimestamp.UnixMilli(),
 	}
 }