GH-1016 - Observability proxying now uses original bean class loader.

Original issue: spring-projects/spring-data-rest#2438.

spring-modulith-observability/src/main/java/org/springframework/modulith/observability/ModuleObservabilitySupport.java

@@ -22,7 +22,6 @@
 import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator;
 import org.springframework.beans.BeansException;
-import org.springframework.beans.factory.BeanClassLoaderAware;
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.BeanFactoryAware;
 import org.springframework.lang.Nullable;
@@ -31,20 +30,10 @@
 /**
  * @author Oliver Drotbohm
  */
-class ModuleObservabilitySupport implements BeanClassLoaderAware, BeanFactoryAware {
+class ModuleObservabilitySupport implements BeanFactoryAware {
 
-	private ClassLoader classLoader;
 	private @Nullable AbstractAutoProxyCreator creator;
 
-	/*
-	 * (non-Javadoc)
-	 * @see org.springframework.beans.factory.BeanClassLoaderAware#setBeanClassLoader(java.lang.ClassLoader)
-	 */
-	@Override
-	public void setBeanClassLoader(ClassLoader classLoader) {
-		this.classLoader = classLoader;
-	}
-
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.beans.factory.BeanFactoryAware#setBeanFactory(org.springframework.beans.factory.BeanFactory)
@@ -77,7 +66,7 @@ protected final Object addAdvisor(Object bean, Advisor advisor, Consumer<ProxyFa
 			customizer.accept(factory);
 			factory.addAdvisor(advisor);
 
-			return factory.getProxy(classLoader);
+			return factory.getProxy(bean.getClass().getClassLoader());
 		}
 	}