feat: stock module

basic_info/migrations/0016_product_unit.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.7 on 2025-11-04 02:12
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('basic_info', '0015_remove_product_single_price_product_single_price_in_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='product',
+            name='unit',
+            field=models.IntegerField(choices=[(1, '米'), (2, '码'), (3, '公斤')], default=1, verbose_name='单位'),
+        ),
+    ]