隐藏式商品/类型增加归属商家端类型，点单按归属写入抢单字段；抢单池只返回商家端类型。

Co-authored-by: Cursor <cursoragent@cursor.com>

shangpin/migrations/0011_guishu_leixing_id.py

@@ -0,0 +1,33 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shangpin', '0010_gsfenhong_fenhong_leixing_unique'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='shangpin',
+            name='guishu_leixing_id',
+            field=models.PositiveIntegerField(
+                blank=True,
+                db_index=True,
+                help_text='仅隐藏式商品使用；指向 shenhezhuangtai=3 的类型',
+                null=True,
+                verbose_name='归属商家端类型ID',
+            ),
+        ),
+        migrations.AddField(
+            model_name='shangpinleixing',
+            name='guishu_leixing_id',
+            field=models.PositiveIntegerField(
+                blank=True,
+                db_index=True,
+                help_text='仅隐藏式类型使用；指向 shenhezhuangtai=3 的类型',
+                null=True,
+                verbose_name='归属商家端类型ID',
+            ),
+        ),
+    ]