fix(provider): detect source code drift and validate package/function references

terraform/provider/internal/resources/validation_helpers.go

@@ -0,0 +1,28 @@
+package resources
+
+import (
+	"context"
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+
+	"terraform-provider-fission/internal/client"
+)
+
+func ensureEnvironmentExists(ctx context.Context, fissionClient *client.Client, namespace, name string) error {
+	_, err := fissionClient.GetEnvironment(ctx, namespace, name)
+	if err != nil {
+		return fmt.Errorf("environment %q не найден в namespace %q: %w", name, namespace, err)
+	}
+
+	return nil
+}
+
+func ensurePackageExists(ctx context.Context, fissionClient *client.Client, namespace, name string) (*unstructured.Unstructured, error) {
+	pkg, err := fissionClient.GetPackage(ctx, namespace, name)
+	if err != nil {
+		return nil, fmt.Errorf("package %q не найден в namespace %q: %w", name, namespace, err)
+	}
+
+	return pkg, nil
+}