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/Chart.yaml

@@ -0,0 +1,21 @@
+annotations:
+  artifacthub.io/license: Apache-2.0
+  artifacthub.io/links: |
+    - name: Chart Source
+      url: https://github.com/perses/helm-charts
+    - name: Upstream Project
+      url: https://github.com/perses/perses
+apiVersion: v2
+appVersion: v0.53.1
+description: Perses helm chart
+icon: https://avatars.githubusercontent.com/u/77209215?s=200&v=4
+keywords:
+- monitoring
+- metric
+- dashboarding
+- prometheus
+name: perses
+sources:
+- https://github.com/perses/perses
+type: application
+version: 0.21.0