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

api_v1/urls.py

@@ -9,6 +9,7 @@ from .views import (
     product_image,
     stateflow,
     users,
+    print_count,
 )
 from .views.stock_change_views.snapshot import StockSnapshotListView
 from .views.printing.views import PrintingOrderViewSet, PrintingJobViewSet, PlateOrderViewSet
@@ -57,6 +58,7 @@ urlpatterns = [
     path('inventory/', inventory.InventoryAPIView.as_view(), name='inventory'),
     path('purchase-orders/', purchase_order.PurchaseOrderView.as_view(), name='purchase_orders'),
     path('health/', healthy.HealthCheckView.as_view(), name='health_check'),
+    path('print-count/delta/', print_count.adjust_print_count, name='print_count_delta'),
     
     # 产品图片上传 API
     path('products/<int:product_id>/image/', product_image.ProductImageUploadView.as_view(), name='product_image_upload'),