테넌트 crud 테스트 코드 추가

backend/internal/repository/user_repository.go

@@ -119,10 +119,10 @@ func (r *userRepository) CountByCompanyCodes(ctx context.Context, codes []string
 	// 1. Resolve IDs for these codes to support dual counting (slug or ID)
 	var tenants []domain.Tenant
 	_ = r.db.WithContext(ctx).Where("slug IN ?", codes).Find(&tenants).Error
-	
+
 	idToSlug := make(map[string]string)
 	slugToNormalized := make(map[string]string)
-	
+
 	for _, code := range codes {
 		slugToNormalized[strings.ToLower(strings.TrimSpace(code))] = code
 	}
@@ -156,13 +156,13 @@ func (r *userRepository) CountByCompanyCodes(ctx context.Context, codes []string
 		} else if res.TenantID != "" {
 			slug = idToSlug[res.TenantID]
 		}
-		
+
 		if slug != "" {
 			normalizedSlug := strings.ToLower(strings.TrimSpace(slug))
 			counts[normalizedSlug] += res.Count
 		}
 	}
-	
+
 	return counts, nil
 }