Update payment

internal/repository/inventory_repository.go

@@ -28,6 +28,7 @@ type InventoryRepository interface {
 	SetQuantity(ctx context.Context, productID, outletID uuid.UUID, quantity int) (*entities.Inventory, error)
 	UpdateReorderLevel(ctx context.Context, id uuid.UUID, reorderLevel int) error
 	BulkCreate(ctx context.Context, inventoryItems []*entities.Inventory) error
+	BulkUpdate(ctx context.Context, inventoryItems []*entities.Inventory) error
 	BulkAdjustQuantity(ctx context.Context, adjustments map[uuid.UUID]int, outletID uuid.UUID) error
 	GetTotalValueByOutlet(ctx context.Context, outletID uuid.UUID) (float64, error)
 }
@@ -276,6 +277,22 @@ func (r *InventoryRepositoryImpl) BulkCreate(ctx context.Context, inventoryItems
 	return r.db.WithContext(ctx).CreateInBatches(inventoryItems, 100).Error
 }
 
+func (r *InventoryRepositoryImpl) BulkUpdate(ctx context.Context, inventoryItems []*entities.Inventory) error {
+	if len(inventoryItems) == 0 {
+		return nil
+	}
+	
+	// Use GORM's transaction for bulk updates
+	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		for _, inventory := range inventoryItems {
+			if err := tx.Save(inventory).Error; err != nil {
+				return fmt.Errorf("failed to update inventory for product %s: %w", inventory.ProductID, err)
+			}
+		}
+		return nil
+	})
+}
+
 func (r *InventoryRepositoryImpl) BulkAdjustQuantity(ctx context.Context, adjustments map[uuid.UUID]int, outletID uuid.UUID) error {
 	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
 		for productID, delta := range adjustments {