feat(tkpurchase): 협력업체 포털/이력에 프로젝트 정보 배지 추가

- 포털 스케줄 카드에 프로젝트명·job_no 초록 배지 표시
- 이력 카드에 프로젝트명·job_no 초록 배지 표시
- checkinModel.findHistoryByCompany에 LEFT JOIN projects 추가

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

tkpurchase/web/static/js/tkpurchase-partner-history.js

@@ -109,7 +109,10 @@ function renderHistoryList(checkins) {
                         <span class="text-sm font-semibold text-gray-800">${checkinDate}</span>
                         ${statusHtml}
                     </div>
-                    <span class="text-xs text-gray-500">${escapeHtml(c.workplace_name || '')}</span>
+                    <div class="flex items-center gap-2">
+                        ${c.project_name ? `<span class="inline-flex items-center gap-1 px-2 py-0.5 rounded-full bg-emerald-100 text-emerald-700 text-xs font-medium"><i class="fas fa-project-diagram text-[10px]"></i>${escapeHtml(c.project_name)}${c.job_no ? ' · ' + escapeHtml(c.job_no) : ''}</span>` : ''}
+                        <span class="text-xs text-gray-500">${escapeHtml(c.workplace_name || '')}</span>
+                    </div>
                 </div>
                 ${c.work_description ? `<p class="text-sm text-gray-600 mb-2">${escapeHtml(c.work_description)}</p>` : ''}
                 <div class="flex gap-4 text-xs text-gray-500 mb-2">