```

perf(database): 优化查询性能通过改进关联查询方式

- 在SplitExecutor.php中将with('receivers')改为get($splitOrderId, ['receivers'])
- 在HuifuSplitService.php中将with('receivers')改为where('id', $splitOrderId)->find()
- 在Settlement控制器中将with('items')改为get($ids, ['items'])

这些改动避免了N+1查询问题，提高了数据库查询效率。
```

addons/shopro/library/split/SplitExecutor.php

@@ -127,7 +127,7 @@ class SplitExecutor
 
     public function retry($splitOrderId)
     {
-        $splitOrder = SplitOrder::with('receivers')->get($splitOrderId);
+        $splitOrder = SplitOrder::get($splitOrderId, ['receivers']);
         if (!$splitOrder) {
             return false;
         }