golangci lint 적용

backend/internal/service/tenant_service.go

@@ -141,12 +141,12 @@ func (s *tenantService) GetTenantByDomain(ctx context.Context, emailDomain strin
 	if err != nil {
 		return nil, err
 	}
-	
+
 	// Only return ACTIVE tenants for auto-assignment
 	if tenant.Status != domain.TenantStatusActive {
 		return nil, errors.New("tenant is not active")
 	}
-	
+
 	return tenant, nil
 }