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/helm/perses/0.21.0/templates/global-admin-bootstrap.yaml

@@ -0,0 +1,30 @@
+{{- if and .Values.sidecar.enabled .Values.sidecar.globalAdminUsers .Values.config.security.enable_auth }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "perses.fullname" . }}-admin-bootstrap
+  labels:
+    {{- include "perses.labels" . | nindent 4 }}
+    {{ .Values.sidecar.label }}: {{ .Values.sidecar.labelValue | quote }}
+data:
+  global-admin-role.yaml: |
+    kind: GlobalRole
+    metadata:
+      name: global-admin
+    spec:
+      permissions:
+        - actions: ["*"]
+          scopes: ["*"]
+
+  global-admin-binding.yaml: |
+    kind: GlobalRoleBinding
+    metadata:
+      name: global-admin-binding
+    spec:
+      role: global-admin
+      subjects:
+        {{- range .Values.sidecar.globalAdminUsers }}
+        - kind: User
+          name: {{ . | quote }}
+        {{- end }}
+{{- end }}