fix(order): 兼容旧逻辑并清理Redis缓存

- 在订单类型为3时设置Redis标识
- 删除冗余的Redis键值对清理操作
- 统一订单内容不可下载的处理逻辑

src/main/java/com/ycwl/basic/service/pc/impl/OrderServiceImpl.java

@@ -1056,6 +1056,9 @@ public class OrderServiceImpl implements OrderService {
         orderItem.setOrderId(order.getId());
         orderItems.add(orderItem);
         // ======== 兼容旧逻辑 ==========
+        if (order.getType() == 3) {
+            redisTemplate.opsForValue().set("order_content_not_downloadable_" + order.getId(), "1");
+        }
         if (type == 13) {
             redisTemplate.opsForValue().set("order_content_not_downloadable_" + order.getId(), "1");
         }

src/main/java/com/ycwl/basic/service/printer/impl/PrinterServiceImpl.java

@@ -1076,6 +1076,7 @@ public class PrinterServiceImpl implements PrinterService {
                     }
                 }
             });
+            redisTemplate.delete("order_content_not_downloadable_" + orderId);
         });
     }