Add Trivy integration to noble cluster setup, including namespace and application configurations. Update README and playbook tags to reflect new security scanning capabilities. Enhance Longhorn and kube-prometheus-stack deployment reliability with increased timeout settings and retry mechanisms.

clusters/noble/bootstrap/trivy/namespace.yaml

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+# Trivy Operator — apply before Helm (Ansible **noble_trivy**).
+# Scan jobs may use elevated capabilities; align with other operator namespaces.
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: trivy-system
+  labels:
+    pod-security.kubernetes.io/enforce: privileged
+    pod-security.kubernetes.io/audit: privileged
+    pod-security.kubernetes.io/warn: privileged

clusters/noble/bootstrap/trivy/values.yaml

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+# Trivy Operator — in-cluster image vulnerability + config reports (Aqua trivy-operator Helm chart).
+#
+#   helm repo add aqua https://aquasecurity.github.io/helm-charts/ && helm repo update
+#   kubectl apply -f clusters/noble/bootstrap/trivy/namespace.yaml
+#   helm upgrade --install trivy-operator aqua/trivy-operator -n trivy-system \
+#     --version 0.32.1 -f clusters/noble/bootstrap/trivy/values.yaml --wait --timeout 15m
+#
+# Inspect: kubectl get vulnerabilityreports,configauditreports -A
+# Docs: https://aquasecurity.github.io/trivy-operator/
+
+# Skip platform/system namespaces (mirrors Kyverno excludes; reduces scan load).
+excludeNamespaces: "argocd,cert-manager,headlamp,kyverno,local-path-storage,logging,longhorn-system,loki,metallb-system,monitoring,newt,traefik,trivy-system,velero,kube-node-lease,kube-public,kube-system"
+
+operator:
+  scanJobsConcurrentLimit: 5
+  # SBOM / cluster compliance add CPU and CR volume; keep vulnerability + config audit.
+  sbomGenerationEnabled: false
+  clusterSbomCacheEnabled: false
+  clusterComplianceEnabled: false
+
+trivyOperator:
+  # Run scan Jobs on every node (Talos / mixed taints).
+  scanJobTolerations:
+    - operator: Exists
+
+serviceMonitor:
+  enabled: true
+  namespace: monitoring