feat: add IsReturnable field to InvReturnProduct and update mapping in response

modules/inventory_return/dto/inventory_return_dto.go

@@ -93,6 +93,7 @@ type InvReturnProduct struct {
 	ID           string                `json:"id"`
 	Name         string                `json:"name"`
 	RefNumber    string                `json:"ref_number"`
+	IsReturnable bool                  `json:"is_returnable"`
 	Uom          pkgdto.IdNameResponse `json:"uom"`
 }
 
@@ -161,6 +162,7 @@ func ToInventoryReturnLineResponse(line entities.TInventoryReturnLineEntity) Inv
 			ID:           line.Product.ID.String(),
 			Name:         line.Product.Name,
 			RefNumber:    line.Product.RefNumber,
+			IsReturnable: line.Product.IsReturnable,
 			Uom:          uom,
 		}
 	}