add - import validator for organization quota stats

apps/product/signals.py

@@ -5,6 +5,7 @@ from django.db.models import Sum, Q
 from django.db.models.signals import post_save, post_delete, post_init
 from django.dispatch import receiver
 
+from apps.product.validators.quota_stats_validator import QuotaStatsValidator
 from apps.warehouse.models import (
     InventoryQuotaSaleTransaction,
     InventoryEntry
@@ -80,7 +81,11 @@ def update_product_stats(instance: Product, distribution: QuotaDistribution = No
     user = get_current_user()  # get user object
     if not isinstance(user, AnonymousUser):
         organization = get_organization_by_user(user)
-
+        QuotaStatsValidator.validate_assigner_has_enough(
+            organization,
+            distribution.quota,
+            distribution.weight
+        )
         if ProductStats.objects.filter(
                 organization=organization,
                 product=instance,