Add VictoriaMetrics observability stack + sync catalog for monitoring test

- VM stack 10 charts: victoria-metrics-cluster/auth, victoria-logs-cluster,
  victoria-metrics-agent/alert, opentelemetry-collector, kube-state-metrics,
  prometheus-node-exporter, alertmanager, perses (JWT/OIDC, Infisical-ready)
- ArgoCD ApplicationSet (syncWave) + per-chart dip-values overlays
- doc/victoria-metrics-architecture.md, define-chart-resources updates
- includes pending working-tree changes (mlflow, kubeflow, apisix, CLAUDE.md)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

manifests/applicationset/victoria-metrics/1.0.0/applicationset.yaml

@@ -0,0 +1,108 @@
+apiVersion: argoproj.io/v1alpha1
+kind: ApplicationSet
+metadata:
+  name: victoria-metrics
+  namespace: argocd
+spec:
+  goTemplate: true
+  goTemplateOptions: ["missingkey=error"]
+  generators:
+    - list:
+        # 각 element: 차트 경로 + 베이스값(카탈로그 custom-values 재사용) + 환경 오버레이(값 repo) + syncWave
+        elements:
+          # ── syncWave 0: 저장소·무의존 ────────────────────────────────────
+          - name: vmcluster
+            chartPath: manifests/helm/victoria-metrics-cluster/0.43.0
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/vmcluster-values.yaml
+            syncWave: "0"
+          - name: vlogs
+            chartPath: manifests/helm/victoria-logs-cluster/0.1.5
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/vlogs-values.yaml
+            syncWave: "0"
+          - name: kube-state-metrics
+            chartPath: manifests/helm/kube-state-metrics/7.4.0
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/kube-state-metrics-values.yaml
+            syncWave: "0"
+          - name: node-exporter
+            chartPath: manifests/helm/prometheus-node-exporter/4.55.0
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/node-exporter-values.yaml
+            syncWave: "0"
+          - name: alertmanager
+            chartPath: manifests/helm/alertmanager/1.37.0
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/alertmanager-values.yaml
+            syncWave: "0"
+          # ── syncWave 1: 저장소·alertmanager 의존 ─────────────────────────
+          - name: vmauth
+            chartPath: manifests/helm/victoria-metrics-auth/0.33.0
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/vmauth-values.yaml
+            syncWave: "1"
+          - name: vmagent
+            chartPath: manifests/helm/victoria-metrics-agent/0.40.0
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/vmagent-values.yaml
+            syncWave: "1"
+          - name: otelcol
+            chartPath: manifests/helm/opentelemetry-collector/0.156.2
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/otelcol-values.yaml
+            syncWave: "1"
+          - name: otelcol-events
+            chartPath: manifests/helm/opentelemetry-collector/0.156.2
+            baseValues: custom-values-events.yaml
+            valuesPath: victoria-metrics/otelcol-events-values.yaml
+            syncWave: "1"
+          - name: vmalert
+            chartPath: manifests/helm/victoria-metrics-alert/0.41.0
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/vmalert-values.yaml
+            syncWave: "1"
+          # ── syncWave 2: vmauth 의존 ──────────────────────────────────────
+          - name: perses
+            chartPath: manifests/helm/perses/0.21.0
+            baseValues: custom-values.yaml
+            valuesPath: victoria-metrics/perses-values.yaml
+            syncWave: "2"
+  template:
+    metadata:
+      name: "{{ .name }}"
+      namespace: argocd
+      annotations:
+        argocd.argoproj.io/sync-wave: "{{ .syncWave }}"
+    spec:
+      project: default
+      sources:
+        # Source 1: 카탈로그 repo (Helm 차트)
+        - repoURL: https://gitea.example.org/dip/catalog-test
+          targetRevision: main
+          path: "{{ .chartPath }}"
+          helm:
+            releaseName: "{{ .name }}"
+            valueFiles:
+              - "{{ .baseValues }}"          # 카탈로그 차트의 정적 베이스값(custom-values)
+              - $values/{{ .valuesPath }}    # Source 2의 환경 오버레이 (나중 = 우선)
+        # Source 2: 값(values) repo — dip-console이 렌더한 환경별 값
+        - repoURL: https://gitea.example.org/dip/values-test
+          targetRevision: main
+          ref: values
+      destination:
+        server: https://kubernetes.default.svc
+        namespace: monitoring
+      syncPolicy:
+        automated:
+          prune: true
+          selfHeal: true
+        syncOptions:
+          - CreateNamespace=true
+          - ServerSideApply=true
+        retry:
+          limit: 5
+          backoff:
+            duration: 10s
+            factor: 2
+            maxDuration: 3m