feat: support pre_sales_order convert to sales_order api

business/migrations/0026_salesorder_from_pre_sales_order.py

@@ -0,0 +1,16 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('business', '0025_allocationrecord'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='salesorder',
+            name='from_pre_sales_order_id',
+            field=models.BigIntegerField(blank=True, null=True, verbose_name='来源预销售单ID'),
+        ),
+    ]