HHH-18829 Hibernate Processor - use LinkedHashMap instead of HashMap into preserve order of record components in generated ID class

Author: cigaly

tooling/metamodel-generator/src/main/java/org/hibernate/processor/annotation/AnnotationMetaEntity.java

@@ -55,6 +55,7 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -167,7 +168,7 @@ public AnnotationMetaEntity(
 		this.element = element;
 		this.context = context;
 		this.managed = managed;
-		this.members = new HashMap<>();
+		this.members = new LinkedHashMap<>();	// Order should be preserved!
 		this.quarkusInjection = context.isQuarkusInjection();
 		this.importContext = new ImportContextImpl( getPackageName( context, element ) );
 		jakartaDataStaticModel = jakartaDataStaticMetamodel;