feat(BE): implement expense tracking for stock transfers and enhance related services

internal/modules/closings/services/closing.service.go

@@ -151,7 +151,7 @@ func (s closingService) GetPenjualan(c *fiber.Ctx, projectFlockID uint) ([]entit
 		return nil, err
 	}
 	if len(realisasi) == 0 {
-		return nil, fiber.NewError(fiber.StatusNotFound, "Penjualan realisasi not found")
+		return []entity.MarketingDeliveryProduct{}, nil
 	}
 	return realisasi, nil
 }