fix: graalvm add missing class

Author: davidfrigolet

core/flamingock-graalvm/src/main/java/io/flamingock/graalvm/RegistrationFeature.java

@@ -18,12 +18,7 @@
 import io.flamingock.api.template.AbstractChangeTemplate;
 import io.flamingock.api.template.ChangeTemplate;
 import io.flamingock.internal.common.core.metadata.FlamingockMetadata;
-import io.flamingock.internal.common.core.preview.CodePreviewChange;
-import io.flamingock.internal.common.core.preview.PreviewMethod;
-import io.flamingock.internal.common.core.preview.PreviewPipeline;
-import io.flamingock.internal.common.core.preview.PreviewStage;
-import io.flamingock.internal.common.core.preview.SystemPreviewStage;
-import io.flamingock.internal.common.core.preview.TemplatePreviewChange;
+import io.flamingock.internal.common.core.preview.*;
 import io.flamingock.internal.common.core.task.AbstractTaskDescriptor;
 import io.flamingock.internal.common.core.task.RecoveryDescriptor;
 import io.flamingock.internal.common.core.task.TargetSystemDescriptor;
@@ -59,6 +54,7 @@ private static void registerInternalClasses() {
         //preview
         registerClassForReflection(PreviewPipeline.class.getName());
         registerClassForReflection(PreviewStage.class.getName());
+        registerClassForReflection(PreviewConstructor.class.getName());
         registerClassForReflection(SystemPreviewStage.class.getName());
         registerClassForReflection(CodePreviewChange.class.getName());
         registerClassForReflection(PreviewMethod.class);