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

printing/migrations/0018_plateorder_plate_image_to_jsonfield.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.7 on 2025-11-27 10:02
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('printing', '0017_alter_plateorder_image_name'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='plateorder',
+            name='plate_image',
+            field=models.JSONField(blank=True, default=dict, help_text='存储多个开版图片的路径，格式: {"image_1": "/path/to/image1.jpg", "image_2": "/path/to/image2.jpg"}', verbose_name='开版图集合'),
+        ),
+    ]