feat: added print_count api, added merchant setting model, added manual mode setting for purchase order

printing/migrations/0020_alter_plateorder_required_completion_date.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.7 on 2025-11-28 02:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('printing', '0019_alter_plateorder_plate_image'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='plateorder',
+            name='required_completion_date',
+            field=models.DateTimeField(blank=True, null=True, verbose_name='要求完成时间'),
+        ),
+    ]