AuditRepository 인터페이스 변경에 맞춰 mock 메서드 추가

backend/internal/handler/common_test.go

@@ -7,6 +7,7 @@ import (
 	"encoding/json"
 	"io"
 	"net/http"
+	"time"
 )
 
 // --- Mock IDP Provider ---
@@ -101,6 +102,15 @@ func (m *mockAuditRepo) FindByUserAndEvents(ctx context.Context, userID string,
 	}
 	return results, nil
 }
+
+func (m *mockAuditRepo) CountFailuresSince(ctx context.Context, since time.Time, tenantID string) (int64, error) {
+	return 0, nil
+}
+
+func (m *mockAuditRepo) CountActiveSessionsSince(ctx context.Context, since time.Time, tenantID string) (int64, error) {
+	return 0, nil
+}
+
 func (m *mockAuditRepo) Ping(ctx context.Context) error { return nil }
 
 // --- Mock Consent Repository ---