feat: added n-to-1 relation between sales_order_item and printing_job model

printing/migrations/0022_printingjob_work_state.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.8 on 2025-12-11 04:49
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('printing', '0021_plateorder_print_count_printingorder_print_count'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='printingjob',
+            name='work_state',
+            field=models.IntegerField(default=0, verbose_name='业务进展'),
+        ),
+    ]