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/opentelemetry-collector/0.156.2/ci/probes-values.yaml

@@ -0,0 +1,37 @@
+mode: daemonset
+
+image:
+  repository: "ghcr.io/open-telemetry/opentelemetry-collector-releases/opentelemetry-collector-k8s"
+
+command:
+  name: "otelcol-k8s"
+
+livenessProbe:
+  initialDelaySeconds: 10
+  periodSeconds: 5
+  timeoutSeconds: 3
+  failureThreshold: 2
+  terminationGracePeriodSeconds: 40
+  httpGet:
+    port: 8989
+    path: /healthz
+
+readinessProbe:
+  initialDelaySeconds: 10
+  periodSeconds: 5
+  timeoutSeconds: 3
+  successThreshold: 2
+  failureThreshold: 2
+  httpGet:
+    port: 8989
+    path: /healthz
+
+startupProbe:
+  initialDelaySeconds: 10
+  periodSeconds: 5
+  timeoutSeconds: 3
+  failureThreshold: 10
+  terminationGracePeriodSeconds: 40
+  httpGet:
+    port: 8989
+    path: /healthz