fix: add default tag name if was missed from configuration

.coderabbit.yaml

@@ -1,5 +1,4 @@
 # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json
-version: 2
 language: "en-US"
 early_access: false
 

internal/healthcheck/check.go

@@ -19,23 +19,32 @@
 ) {
 	wg := sync.WaitGroup{}
 
-	service := &cfg.Cluster
-	if service.Enabled && len(service.Resources) > 0 {
+	cluster := &cfg.Cluster
+	if cluster.Enabled && len(cluster.Resources) > 0 {
+		if cluster.Tag == "" {
+			cluster.Tag = "cluster"
+		}
 		wg.Go(func() {
-			ch.processResources(ctx, service, verifyServiceResource, resultCollector)
+			ch.processResources(ctx, cluster, verifyServiceResource, resultCollector)
 		})
 	}
 
 	k8s := &cfg.Kubernetes
 	if k8s.Enabled && len(k8s.Resources) > 0 {
+		if k8s.Tag == "" {
+			k8s.Tag = "kubernetes"
+		}
 		wg.Go(func() {
 			ch.processResources(ctx, k8s, verifyK8SResource, resultCollector)
 		})
 	}
 
 	linkerd := &cfg.Linkerd
 	if linkerd.Enabled {
+		if linkerd.Tag == "" {
+			linkerd.Tag = "linkerd"
+		}
 		wg.Go(func() {
 			ch.processLinkerdResources(ctx, linkerd, resultCollector)
 		})
 	}