fix: graalvm add missing class and initialize class at build time

Author: davidfrigolet

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

@@ -106,6 +106,7 @@ private static void registerUserClasses() {
     private static void registerClassForReflection(String className) {
         try {
             registerClassForReflection(Class.forName(className));
+            initializeClassAtBuildTime(Class.forName(className));
         } catch (ClassNotFoundException e) {
             throw new RuntimeException(e);
         }