fix(payment): 补升 schema 版本使售后举证图片列在已安装站点生效

order_aftersale 新增 images 列时未同步升 SCHEMA_VERSION，而 dbDelta 只在版本
变化时重跑，已安装站点不会执行 ALTER TABLE，提交售后申请直接报
Unknown column 'images'。SCHEMA_VERSION 2.5.0 -> 2.5.1，并在契约测试中
锁定「列变更必须同步升版本」，部署后进入一次 wp-admin 即自动补列。

tests/widget-system/after-sale-policy-contract.test.cjs

@@ -181,6 +181,17 @@ test('after-sale tickets persist evidence images and expose the latest row', ()
   const schema = read('src/Core/DBMigratorPart2.php')
   assert.match(schema, /CREATE TABLE \{\$prefix\}aksrt_order_aftersale[\s\S]*?images LONGTEXT DEFAULT NULL[\s\S]*?refund_amount/)
 
+  // images 列随 schema 2.5.1 引入：dbDelta 只在版本变化时重跑，列变更必须同步升版本，
+  // 否则老安装不会 ALTER TABLE，写入直接报 Unknown column 'images'。
+  const migrator = read('src/Core/DBMigrator.php')
+  const version = migrator.match(/const SCHEMA_VERSION = '(\d+)\.(\d+)\.(\d+)'/)
+  assert.ok(version, 'DBMigrator exposes a numeric SCHEMA_VERSION')
+  const [major, minor, patch] = version.slice(1).map(Number)
+  assert.ok(
+    major > 2 || (major === 2 && minor > 5) || (major === 2 && minor === 5 && patch >= 1),
+    `SCHEMA_VERSION must be at least 2.5.1 after adding order_aftersale.images, got ${major}.${minor}.${patch}`
+  )
+
   const service = read('src/Payment/AfterSaleService.php')
   assert.match(service, /public function create\(int \$user_id, string \$order_number, string \$reason, array \$images = \[\]\)/)
   assert.match(service, /\$images = \$this->sanitize_images\(\$images\);/)