feat: add explicit namespace resource to production Kubernetes overlay

- Add namespace.yaml to production overlay resources
- Ensure proper namespace creation in production deployments
- Improve Kubernetes resource management and isolation

k8s-kustomize/overlays/prod/kustomization.yaml

@@ -7,6 +7,7 @@ metadata:
 # Reference the base configuration
 resources:
   - ../../base
+  - namespace.yaml
 
 # Override namespace for production
 namespace: rxminder-prod