Merge pull request 'feat(products): sort by' (#26) from staging into main

Reviewed-on: #26

internal/repository/product_repository.go

@@ -112,7 +112,9 @@ func (r *ProductRepositoryImpl) List(ctx context.Context, filters map[string]int
 		return nil, 0, err
 	}
 
-	err := query.Limit(limit).Offset(offset).Find(&products).Error
+	// id is a tie-breaker so LIMIT/OFFSET paging stays stable when several products
+	// share the same created_at.
+	err := query.Order("created_at DESC, id DESC").Limit(limit).Offset(offset).Find(&products).Error
 	return products, total, err
 }
 
@@ -265,6 +267,8 @@ func (r *ProductRepositoryImpl) ListWithOutletPrice(ctx context.Context, filters
 		return nil, 0, err
 	}
 
-	err := query.Limit(limit).Offset(offset).Find(&products).Error
+	// Columns are qualified because the outlet join brings a second created_at/id
+	// into scope. id is a tie-breaker for stable LIMIT/OFFSET paging.
+	err := query.Order("products.created_at DESC, products.id DESC").Limit(limit).Offset(offset).Find(&products).Error
 	return products, total, err
 }