feat: add syj promote workflow

pro_v3.5.1/app/dao/syj/PromoteUserAmountDao.php

@@ -0,0 +1,21 @@
+<?php
+declare(strict_types=1);
+
+namespace app\dao\syj;
+
+use app\dao\BaseDao;
+use app\model\syj\PromoteUserAmount;
+
+class PromoteUserAmountDao extends BaseDao
+{
+    protected function setModel(): string
+    {
+        return PromoteUserAmount::class;
+    }
+
+    public function lockByUid(int $uid): ?array
+    {
+        $row = $this->getModel()->where('uid', $uid)->lock(true)->find();
+        return $row ? $row->toArray() : null;
+    }
+}