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/README.md.gotmpl

@@ -0,0 +1,33 @@
+<!-- Any change to the README file must be must be done on README.md.gotmpl file -->
+
+{{ template "chart.header" . }}
+{{ template "chart.description" . }}
+
+{{ template "chart.versionBadge" . }}{{ template "chart.typeBadge" . }}{{ template "chart.appVersionBadge" . }}
+
+## Installing the Chart
+
+To install the chart with the release name `my-release`:
+
+```
+helm repo add perses https://perses.github.io/helm-charts
+helm repo update
+helm install my-release perses/perses
+```
+
+## Uninstalling the Chart
+
+To uninstall/delete the my-release deployment:
+
+```
+helm delete my-release
+```
+
+## Upgrading
+
+For upgrade instructions, including handling breaking changes between versions, see the [Upgrade Guide](../../docs/upgrade-guide.md).
+{{ template "chart.requirementsSection" . }}
+
+{{ template "chart.valuesSection" . }}
+
+{{ template "helm-docs.versionFooter" . }}