Support AutoGeneratedTimestamp and UpdateBehavior annotation in nested objects

Author: anasatirbasa

services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/internal/extensions/utility/NestedRecordUtils.java

@@ -71,9 +71,9 @@ public static TableSchema<?> getTableSchemaForListElement(TableSchema<?> rootSch
                     }
                 }
                 String attributeName = parts[parts.length - 1];
-                listElementSchema = TableSchema.fromClass(
-                    Class.forName(currentSchema.converterForAttribute(attributeName)
-                                               .type().rawClassParameters().get(0).rawClass().getName()));
+                Optional<? extends TableSchema<?>> nestedListSchema = getNestedSchema(currentSchema, attributeName);
+                listElementSchema = nestedListSchema
+                    .orElseThrow(() -> new IllegalArgumentException("Unable to resolve schema for list element at: " + key));
             }
         } catch (ClassNotFoundException e) {
             throw new IllegalArgumentException("Class not found for field name: " + key, e);