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/apisix/2.14.0/Chart.yaml

@@ -0,0 +1,31 @@
+annotations:
+  artifacthub.io/prerelease: "false"
+apiVersion: v2
+appVersion: 3.16.0
+dependencies:
+- condition: etcd.enabled
+  name: etcd
+  repository: https://charts.bitnami.com/bitnami
+  version: 12.0.18
+- alias: ingress-controller
+  condition: ingress-controller.enabled
+  name: apisix-ingress-controller
+  repository: https://apache.github.io/apisix-helm-chart
+  version: 1.1.1
+description: A Helm chart for Apache APISIX v3
+icon: https://apache.org/logos/res/apisix/apisix.png
+maintainers:
+- name: tao12345666333
+- email: alinsran@apache.org
+  name: AlinsRan
+- email: nic443@apache.org
+  name: nic-6443
+- email: bzp2010@apache.org
+  name: bzp2010
+- email: juzhiyuan@api7.ai
+  name: juzhiyuan
+name: apisix
+sources:
+- https://github.com/apache/apisix-helm-chart
+type: application
+version: 2.14.0