feat(import-product): Update product size and last modified time in sync cache; add EAN check in product combinations

.vscode/ftp-kr.sync.cache.json

@@ -1638,8 +1638,8 @@
       },
       "import-product.php": {
         "type": "-",
-        "size": 32213,
-        "lmtime": 1749162688552,
+        "size": 32611,
+        "lmtime": 1749496861877,
         "modified": false
       },
       "index.php": {

import-product.php

@@ -78,6 +78,9 @@ foreach ( $products_array as $product )
 
   foreach ( $product['combinations'] as $combination )
   {
+    if ( empty( $combination['ean'] ) )
+      continue;
+
     $sql_combination = 'UPDATE `' . _DB_PREFIX_ . 'product_attribute` SET `price` = ' . (float)$combination['price'] . ' WHERE `reference` = \'' . pSQL($combination['ean']) . '\'';
     $result_combination = Db::getInstance()->execute($sql_combination);