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/servicemonitor.yaml

@@ -0,0 +1,47 @@
+# ------------------------------------------------------------------------------
+# Pure FlashArray OpenMetrics Exporter - ServiceMonitor
+#
+# Configures Prometheus Operator to scrape Pure FlashArray metrics
+# 
+# Scrape interval: 60s (storage metrics don't need high frequency)
+# Endpoint: /metrics?endpoint=utilidor (multi-target exporter pattern)
+# Metrics namespace: pure_* (purefa_info, purefa_array_*, purefa_volume_*, etc.)
+# ------------------------------------------------------------------------------
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: pure-fa-exporter
+  namespace: monitoring
+  labels:
+    app.kubernetes.io/name: pure-fa-exporter
+    app.kubernetes.io/component: metrics
+    # Label selector for kube-prometheus-stack
+    release: monitoring
+spec:
+  # Select the pure-fa-exporter service
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: pure-fa-exporter
+  
+  # Namespace selector
+  namespaceSelector:
+    matchNames:
+    - monitoring
+  
+  # Scrape endpoint configuration
+  endpoints:
+  - port: metrics
+    interval: 60s
+    scrapeTimeout: 30s
+    path: /metrics
+    # Query parameter for multi-target exporter pattern
+    # Uses the array_id from tokens.yaml (utilidor)
+    params:
+      endpoint: 
+      - utilidor
+    
+    # Relabeling to add FlashArray identifier
+    relabelings:
+    - sourceLabels: [__param_endpoint]
+      targetLabel: array
+      action: replace