feat: 假单种子脚本、商家名称字段、返回随机顺序与时间

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

orders/migrations/0011_fakegraborder_merchantnickname.py

@@ -0,0 +1,22 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('orders', '0010_fakegraborder'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='fakegraborder',
+            name='MerchantNickname',
+            field=models.CharField(
+                blank=True,
+                db_column='shangjia_nicheng',
+                max_length=50,
+                null=True,
+                verbose_name='商家名称（假单展示）',
+            ),
+        ),
+    ]