participation-service pod 연결 문제 해결

- Service selector를 app=participation-service만으로 간소화하여 영구적 해결
- Pod restart 시에도 자동 연결되도록 수정
- Swagger UI 외부 접근 정상화 확인

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

participation-service-backup.yaml

@@ -0,0 +1,38 @@
+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    kubectl.kubernetes.io/last-applied-configuration: |
+      {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"participation-service","app.kubernetes.io/managed-by":"kustomize","app.kubernetes.io/part-of":"kt-event-marketing","environment":"dev"},"name":"participation-service","namespace":"kt-event-marketing"},"spec":{"ports":[{"name":"http","port":80,"protocol":"TCP","targetPort":8084}],"selector":{"app":"participation-service","app.kubernetes.io/managed-by":"kustomize","app.kubernetes.io/part-of":"kt-event-marketing","environment":"dev"},"type":"ClusterIP"}}
+  creationTimestamp: "2025-10-28T08:59:06Z"
+  labels:
+    app: participation-service
+    app.kubernetes.io/managed-by: kustomize
+    app.kubernetes.io/part-of: kt-event-marketing
+    environment: dev
+  name: participation-service
+  namespace: kt-event-marketing
+  resourceVersion: "125107611"
+  uid: da5b7f82-37d3-41bd-ad87-e2864c8bcd18
+spec:
+  clusterIP: 10.0.130.146
+  clusterIPs:
+  - 10.0.130.146
+  internalTrafficPolicy: Cluster
+  ipFamilies:
+  - IPv4
+  ipFamilyPolicy: SingleStack
+  ports:
+  - name: http
+    port: 80
+    protocol: TCP
+    targetPort: 8084
+  selector:
+    app: participation-service
+    app.kubernetes.io/managed-by: kustomize
+    app.kubernetes.io/part-of: kt-event-marketing
+    environment: dev
+  sessionAffinity: None
+  type: ClusterIP
+status:
+  loadBalancer: {}

participation-service-fixed.yaml

@@ -0,0 +1,27 @@
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: participation-service
+    app.kubernetes.io/managed-by: kustomize
+    app.kubernetes.io/part-of: kt-event-marketing
+    environment: dev
+  name: participation-service
+  namespace: kt-event-marketing
+spec:
+  clusterIP: 10.0.130.146
+  clusterIPs:
+  - 10.0.130.146
+  internalTrafficPolicy: Cluster
+  ipFamilies:
+  - IPv4
+  ipFamilyPolicy: SingleStack
+  ports:
+  - name: http
+    port: 80
+    protocol: TCP
+    targetPort: 8084
+  selector:
+    app: participation-service
+  sessionAffinity: None
+  type: ClusterIP