fix(sprint004-b): initAuth() 추가 + getSSOToken + 캐시 버스팅

- monthly-comparison.html: initAuth() 호출 추가 (인증/사용자 정보 로드)
- monthly-comparison.js: 엑셀 다운로드 토큰을 getSSOToken으로 전환
- 캐시 버스팅: ?v=2026033102

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

system1-factory/web/pages/attendance/monthly-comparison.html

@@ -159,6 +159,7 @@
 
     <script src="/static/js/tkfb-core.js?v=2026033001"></script>
     <script src="/js/api-base.js?v=2026031701"></script>
-    <script src="/js/monthly-comparison.js?v=2026033001"></script>
+    <script src="/js/monthly-comparison.js?v=2026033102"></script>
+    <script>initAuth();</script>
 </body>
 </html>