fix over consume by code, revert migration overconsume sell

internal/modules/marketing/services/deliveryorder.service.go

@@ -972,6 +972,19 @@ func (s deliveryOrdersService) consumeDeliveryStock(ctx context.Context, tx *gor
 	if err := deliveryProductRepo.UpdateOne(ctx, deliveryProduct.Id, deliveryProduct, nil); err != nil {
 		return fiber.NewError(fiber.StatusInternalServerError, "Failed to update delivery product")
 	}
+	if requestedQty > 0 {
+		available, err := s.checkAvailableStockQty(ctx, tx, marketingProduct.ProductWarehouseId)
+		if err != nil {
+			return fiber.NewError(fiber.StatusInternalServerError, "Gagal memeriksa ketersediaan stok")
+		}
+		if requestedQty > available {
+			return fiber.NewError(fiber.StatusBadRequest, fmt.Sprintf(
+				"Stok tidak mencukupi: dibutuhkan %g, tersedia %g",
+				requestedQty, available,
+			))
+		}
+	}
+
 	if err := reflowMarketingScope(
 		ctx,
 		s.FifoStockV2Svc,
@@ -1505,3 +1518,28 @@ func uniqueUintIDs(ids []uint) []uint {
 	}
 	return result
 }
+
+// checkAvailableStockQty returns the net available qty for a product warehouse:
+// gross qty (product_warehouses.qty) minus the sum of active CONSUME allocations
+// in stock_allocations. This gives the true available stock accounting for all
+// other delivery orders that have already consumed from the same warehouse.
+func (s deliveryOrdersService) checkAvailableStockQty(ctx context.Context, tx *gorm.DB, productWarehouseId uint) (float64, error) {
+	var pw entity.ProductWarehouse
+	if err := tx.WithContext(ctx).Select("qty").First(&pw, productWarehouseId).Error; err != nil {
+		return 0, err
+	}
+
+	var usedQty float64
+	if err := tx.WithContext(ctx).Raw(`
+		SELECT COALESCE(SUM(qty), 0)
+		FROM stock_allocations
+		WHERE stockable_type     = 'product_warehouses'
+		  AND stockable_id       = ?
+		  AND status             = 'ACTIVE'
+		  AND allocation_purpose = 'CONSUME'
+	`, productWarehouseId).Scan(&usedQty).Error; err != nil {
+		return 0, err
+	}
+
+	return pw.Quantity - usedQty, nil
+}