add product inventory

internal/transformer/inventory_transformer.go

@@ -43,6 +43,10 @@ func InventoryModelResponseToResponse(inv *models.InventoryResponse) *contract.I
 		ReorderLevel: inv.ReorderLevel,
 		IsLowStock:   inv.IsLowStock,
 		UpdatedAt:    inv.UpdatedAt,
+		Product: &contract.ProductResponse{
+			ID:   inv.ProductID,
+			Name: inv.ProductName,
+		},
 	}
 }