fix(仓储): 修复查询关闭错误并迁移集成测试

修复 rows.Close 失败时的错误返回逻辑
迁移网关路由集成测试到 ent 事务基建
补齐仓储接口变更对应的测试桩方法
新增 backend/Makefile 统一测试命令
测试: GOTOOLCHAIN=go1.24.11 go test ./...
测试: golangci-lint run ./... --timeout=5m
测试: make test-integration

backend/internal/server/middleware/api_key_auth_test.go

@@ -131,6 +131,10 @@ func (r *stubApiKeyRepo) GetByID(ctx context.Context, id int64) (*service.ApiKey
 	return nil, errors.New("not implemented")
 }
 
+func (r *stubApiKeyRepo) GetOwnerID(ctx context.Context, id int64) (int64, error) {
+	return 0, errors.New("not implemented")
+}
+
 func (r *stubApiKeyRepo) GetByKey(ctx context.Context, key string) (*service.ApiKey, error) {
 	if r.getByKey != nil {
 		return r.getByKey(ctx, key)