Add Pure FlashArray OpenMetrics exporter to monitoring namespace

- Deploy purestorage/pure-fa-om-exporter:v1.0.27 container
- Configure API token secret for utilidor FlashArray (jarvis user)
- Expose /metrics endpoint via ClusterIP service on port 9490
- ServiceMonitor for kube-prometheus-stack auto-discovery
- ArgoCD application for GitOps deployment (wave 3)
- Scrape interval: 60s (storage metrics low frequency)
- Resource limits: 200m CPU / 128Mi memory

Provides pure_* metrics namespace for FlashArray capacity, performance,
volume stats, host connectivity, etc.

cluster/platform/pure-exporter/service.yaml

@@ -0,0 +1,23 @@
+# ------------------------------------------------------------------------------
+# Pure FlashArray OpenMetrics Exporter - Service
+#
+# ClusterIP service exposing /metrics endpoint for Prometheus scraping
+# No ingress needed - pure east/west traffic within monitoring namespace
+# ------------------------------------------------------------------------------
+apiVersion: v1
+kind: Service
+metadata:
+  name: pure-fa-exporter
+  namespace: monitoring
+  labels:
+    app.kubernetes.io/name: pure-fa-exporter
+    app.kubernetes.io/component: metrics
+spec:
+  type: ClusterIP
+  ports:
+  - name: metrics
+    port: 9490
+    targetPort: metrics
+    protocol: TCP
+  selector:
+    app.kubernetes.io/name: pure-fa-exporter