PERF(observability): optimize resources via VPA

- alertmanager: CPU 15m/15m, memory 100Mi/100Mi
- blackbox-exporter: CPU 15m/32m, memory 100Mi/100Mi
- goldilocks: controller 15m/25m, dashboard 15m/15m
- grafana: CPU 22m/24m, memory 144Mi/242Mi (upperBound)
- kube-state-metrics: CPU 15m/15m, memory 100Mi/100Mi
- loki: CPU 10m/69m, memory 225Mi/323Mi
- node-exporter: CPU 15m/15m, memory 100Mi/100Mi
- opentelemetry: CPU 34m/410m, memory 142Mi/1024Mi
- prometheus-operator: CPU 15m/15m, memory 100Mi/100Mi
- tempo: CPU 15m/15m, memory 100Mi/109Mi
- thanos: CPU 15m/15m, memory 100Mi/126Mi
- vpa: CPU 15m/15m, memory 100Mi/100Mi

kube-state-metrics/helm-values.yaml

@@ -7,12 +7,14 @@ fullnameOverride: kube-state-metrics
 # Note: kube-state-metrics는 stateless이지만, 여러 replica는 동일한 메트릭을 중복 생성하므로
 # 단일 replica로 실행하는 것이 권장됩니다.
 
+# Resource settings (VPA lowerBound/upperBound)
 resources:
   requests:
     cpu: 15m
-    memory: 105Mi
+    memory: 100Mi
   limits:
-    memory: 105Mi
+    cpu: 15m
+    memory: 100Mi
 
 service:
   type: ClusterIP