테넌트 목록 조회 cursor기반으로 재구성. 사용자 metadata 미사용 필드 제거

backend/internal/handler/user_handler.go

@@ -221,25 +221,41 @@ func gradeFromTraits(traits map[string]interface{}) string {
 	return value
 }
 
-func tenantSlugFromRequest(tenantSlug string, legacyCompanyCode string) string {
-	if value := strings.TrimSpace(tenantSlug); value != "" {
-		return value
-	}
-	return strings.TrimSpace(legacyCompanyCode)
-}
-
-func tenantSlugPointerFromRequest(tenantSlug *string, legacyCompanyCode *string) *string {
-	if tenantSlug != nil {
-		value := strings.TrimSpace(*tenantSlug)
-		return &value
-	}
-	if legacyCompanyCode != nil {
-		value := strings.TrimSpace(*legacyCompanyCode)
-		return &value
+func rejectLegacyCompanyCode(value string) error {
+	if strings.TrimSpace(value) != "" {
+		return errors.New("companyCode is deprecated; use tenantSlug")
 	}
 	return nil
 }
 
+func rejectLegacyCompanyCodePointer(value *string) error {
+	if value == nil {
+		return nil
+	}
+	return rejectLegacyCompanyCode(*value)
+}
+
+func tenantSlugFromRequest(tenantSlug string, legacyCompanyCode string) (string, error) {
+	if err := rejectLegacyCompanyCode(legacyCompanyCode); err != nil {
+		return "", err
+	}
+	if value := strings.TrimSpace(tenantSlug); value != "" {
+		return value, nil
+	}
+	return "", nil
+}
+
+func tenantSlugPointerFromRequest(tenantSlug *string, legacyCompanyCode *string) (*string, error) {
+	if err := rejectLegacyCompanyCodePointer(legacyCompanyCode); err != nil {
+		return nil, err
+	}
+	if tenantSlug != nil {
+		value := strings.TrimSpace(*tenantSlug)
+		return &value, nil
+	}
+	return nil, nil
+}
+
 type userSummary struct {
 	ID              string          `json:"id"`
 	Email           string          `json:"email"`