fix(installer): add keep annotation to Namespace and update migration script

Add helm.sh/resource-policy=keep annotation to the cozy-system Namespace
in the installer helm chart. This prevents Helm from deleting the
namespace when the HelmRelease is removed, which would otherwise destroy
all other HelmReleases within it.

Update the migration script to annotate the cozy-system namespace and
cozystack-version ConfigMap with helm.sh/resource-policy=keep before
generating the Package resource.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Andrei Kvapil <kvapss@gmail.com>
(cherry picked from commit c83e41ea14)

hack/migrate-to-version-1.0.sh

@@ -32,6 +32,30 @@ if ! kubectl get namespace "$NAMESPACE" &> /dev/null; then
     exit 1
 fi
 
+# Step 0: Annotate critical resources to prevent Helm from deleting them
+echo "Step 0: Protect critical resources from Helm deletion"
+echo ""
+echo "The following resources will be annotated with helm.sh/resource-policy=keep"
+echo "to prevent Helm from deleting them when the installer release is removed:"
+echo "  - Namespace: $NAMESPACE"
+echo "  - ConfigMap: $NAMESPACE/cozystack-version"
+echo ""
+read -p "Do you want to annotate these resources? (y/N) " -n 1 -r
+echo ""
+
+if [[ $REPLY =~ ^[Yy]$ ]]; then
+    echo "Annotating namespace $NAMESPACE..."
+    kubectl annotate namespace "$NAMESPACE" helm.sh/resource-policy=keep --overwrite
+    echo "Annotating ConfigMap cozystack-version..."
+    kubectl annotate configmap -n "$NAMESPACE" cozystack-version helm.sh/resource-policy=keep --overwrite 2>/dev/null || echo "  ConfigMap cozystack-version not found, skipping."
+    echo ""
+    echo "Resources annotated successfully."
+else
+    echo "WARNING: Skipping annotation. If you remove the Helm installer release,"
+    echo "the namespace and its contents may be deleted!"
+fi
+echo ""
+
 # Read ConfigMap cozystack
 echo "Reading ConfigMap cozystack..."
 COZYSTACK_CM=$(kubectl get configmap -n "$NAMESPACE" cozystack -o json 2>/dev/null || echo "{}")

packages/core/installer/templates/cozystack-operator.yaml

@@ -10,6 +10,8 @@ metadata:
   labels:
     cozystack.io/system: "true"
     pod-security.kubernetes.io/enforce: privileged
+  annotations:
+    helm.sh/resource-policy: keep
 ---
 apiVersion: v1
 kind: ServiceAccount