feat: add profit and special discount fields to ProductVariant model

- Updated ProductVariant model to include 'profit' and 'special_discount_percent' fields.
- Added corresponding fields in the admin interface for ProductVariant.
- Created migration to add new fields to the database.

feat: implement special discount code functionality in cart

- Added composables for submitting and deleting special discount codes.
- Updated CartSummary and CartItem components to handle special discount codes.
- Enhanced API endpoints to support special discount operations.
- Updated global types to include special discount code details in the cart.

backend/order/tasks.py

@@ -7,7 +7,7 @@ from azbankgateways import (
 from .models import OrderModel
 from account.models import PushSubscription
 import ghasedak_sms
-
+from product.models import ProductImageModel
 from celery import shared_task
 
 @shared_task
@@ -24,6 +24,8 @@ def udpate_bank_status():
         bank_record = bank_models.Bank.objects.get(tracking_code=item.tracking_code)
         if bank_record.is_success:
             bank_record.order.cart.clear_cart()
+            bank_record.order.is_paid = True
+            bank_record.order.save()
             logging.debug("This record is verify now.", extra={"pk": bank_record.pk})
         else:
             order = bank_record.order