fix: 회의록 생성 시 tenant_id 세션 참조 수정

- currentTenantId() → session('selected_tenant_id') 변경
- Google Cloud 인증파일 .gitignore 추가

.gitignore

@@ -22,3 +22,4 @@
 Homestead.json
 Homestead.yaml
 Thumbs.db
+storage/credentials/

app/Services/MeetingLogService.php

@@ -60,7 +60,7 @@ public function getById(int $id): ?MeetingLog
     public function create(array $data): MeetingLog
     {
         return MeetingLog::create([
-            'tenant_id' => currentTenantId(),
+            'tenant_id' => session('selected_tenant_id'),
             'user_id' => Auth::id(),
             'title' => $data['title'] ?? '무제 회의록',
             'status' => MeetingLog::STATUS_PENDING,