Add check 'skipBeforeDraftCancel' to processBeforeDraftCancel method, this method was possibly called on composition/association entities before

Author: lisajulia

cds-feature-attachments/src/main/java/com/sap/cds/feature/attachments/handler/draftservice/DraftCancelAttachmentsHandler.java

@@ -58,7 +58,7 @@ public DraftCancelAttachmentsHandler(
   @Before
   @HandlerOrder(HandlerOrder.LATE)
   void processBeforeDraftCancel(DraftCancelEventContext context) {
-    if (isWhereEmpty(context)) {
+    if (!skipBeforeDraftCancel(context)) {
       logger.debug(
           "Processing before {} event for entity {}", context.getEvent(), context.getTarget());
 
@@ -98,8 +98,18 @@ private Validator buildDeleteContentValidator(
     };
   }
 
-  private boolean isWhereEmpty(DraftCancelEventContext context) {
-    return context.getCqn().where().isEmpty();
+  private boolean skipBeforeDraftCancel(DraftCancelEventContext context) {
+    if (context.getCqn().where().isEmpty()) {
+      logger.debug("Skipping draft cancel processing for entity {} because this is a bulk operation (no WHERE clause found in context).", context.getTarget().getQualifiedName());
+      return true;
+    }
+    String entityName = context.getTarget().getName();
+    if (entityName.contains(".")) {
+      logger.debug("Skipping draft cancel processing for entity {} because this is a composition/association entity (contains dots indicating nested path).", entityName);
+      return true;
+    }    
+    // Do not skip processing for other cases
+    return false;
   }
 
   private List<Attachments> readAttachments(