Close S5 app readiness workplan

tools/k8s-server-dry-run.sh

@@ -17,9 +17,16 @@ for cmd in kubectl helm; do
   fi
 done
 
-kubectl api-resources >/dev/null
+echo "server dry-run: checking Kubernetes API discovery"
+if ! kubectl api-resources >/dev/null; then
+  echo "ERROR: cannot reach a representative Kubernetes API server" >&2
+  echo "Check kubeconfig, runner placement, and cluster access prerequisites." >&2
+  echo "See docs/manifest-server-dry-run.md." >&2
+  exit 1
+fi
 
 if [[ "$DRY_RUN_CREATE_NAMESPACES" == "true" ]]; then
+  echo "server dry-run: ensuring namespace $VERGABE_NAMESPACE exists"
   kubectl create namespace "$VERGABE_NAMESPACE" --dry-run=client -o yaml | kubectl apply -f -
 fi