feat: convert Deployment to Rollout CRD with canary strategy

- Replace deployment.yaml with rollout.yaml
- Add canary-service.yaml for traffic splitting
- Add analysistemplate.yaml for Prometheus health checks
- Update HTTPRoute with dual backends (stable + canary)
- Update overlays with Rollout patches
- Add Rollout transformer configuration for Kustomize

apps/myapp/base/analysistemplate.yaml

@@ -0,0 +1,22 @@
+apiVersion: argoproj.io/v1alpha1
+kind: AnalysisTemplate
+metadata:
+  name: success-rate
+  labels:
+    app: myapp
+    managed-by: argocd
+spec:
+  args:
+  - name: service-name
+  metrics:
+  - name: success-rate
+    interval: 30s
+    successCondition: result[0] >= 0.95
+    failureLimit: 3
+    provider:
+      prometheus:
+        address: http://kube-prometheus-stack-prometheus.monitoring.svc.cluster.local:9090
+        query: |
+          sum(rate(http_requests_total{service="{{args.service-name}}",code=~"2.."}[1m]))
+          /
+          sum(rate(http_requests_total{service="{{args.service-name}}"}[1m]))