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/victoria-metrics-alert/0.41.0/templates/alert-service.yaml

@@ -0,0 +1,54 @@
+{{- $app := .Values.server }}
+{{- $service := $app.service }}
+{{- $ctx := dict "helm" . "appKey" "server" }}
+{{- $fullname := include "vm.plain.fullname" $ctx }}
+{{- $ns := include "vm.namespace" $ctx }}
+apiVersion: v1
+kind: Service
+metadata:
+  namespace: {{ $ns }}
+  {{- with $service.annotations }}
+  annotations: {{ toYaml . | nindent 4 }}
+  {{- end }}
+  {{- $_ := set $ctx "extraLabels" $app.service.labels }}
+  labels: {{ include "vm.labels" $ctx | nindent 4 }}
+  {{- $_ := unset $ctx "extraLabels" }}
+  name: {{ $fullname }}
+spec:
+  {{- with $service.trafficDistribution }}
+  trafficDistribution: {{ . }}
+  {{- end }}
+  {{- with $service.clusterIP }}
+  clusterIP: {{ . }}
+  {{- end }}
+  {{- with $service.externalIPs }}
+  externalIPs: {{ toYaml . | nindent 4 }}
+  {{- end }}
+  {{- with $service.loadBalancerIP }}
+  loadBalancerIP: {{ . }}
+  {{- end }}
+  {{- with $service.loadBalancerSourceRanges }}
+  loadBalancerSourceRanges: {{ toYaml . | nindent 4 }}
+  {{- end }}
+  type: {{ $service.type }}
+  {{- with $service.healthCheckNodePort }}
+  healthCheckNodePort: {{ . }}
+  {{- end }}
+  {{- with $service.externalTrafficPolicy }}
+  externalTrafficPolicy: {{ . }}
+  {{- end }}
+  {{- with $service.ipFamilyPolicy }}
+  ipFamilyPolicy: {{ . }}
+  {{- end }}
+  {{- with $service.ipFamilies }}
+  ipFamilies: {{ toYaml . | nindent 4 }}
+  {{- end }}
+  ports:
+    - name: http
+      port: {{ $service.servicePort }}
+      targetPort: http
+      protocol: TCP
+      {{- with $service.nodePort }}
+      nodePort: {{ . }}
+      {{- end }}
+  selector: {{ include "vm.selectorLabels" $ctx | nindent 4 }}