fix: 지도 작업자 수 중복 카운트 수정 (team_member_count + leader 이중 합산 제거)

- system1 workplace-status.js: leader_id에 의한 +1 제거
- system1 mobile-dashboard.js: +1 제거 (2곳)
- system2 issue-report.js: leader_id에 의한 +1 제거
- dashboard.html: JS 캐시 버스팅 버전 파라미터 추가

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

system1-factory/web/js/workplace-status.js

@@ -189,8 +189,7 @@ async function loadTodayWorkers(date) {
       sessions.forEach(session => {
         if (session.workplace_id) {
           const memberCount = session.team_member_count || 0;
-          const leaderCount = session.leader_id ? 1 : 0;
-          const totalCount = memberCount + leaderCount;
+          const totalCount = memberCount;
 
           todayWorkers.push({
             workplace_id: session.workplace_id,