add SSH debug connection test to CI/CD workflow and enable batch mode for rsync

.gitea/workflows/ci-cd.yml

@@ -53,11 +53,16 @@ jobs:
           # 키가 깨진 채로 저장됐다면 여기서 바로 에러가 나서 원인을 알 수 있음
           ssh-keygen -y -f ~/.ssh/id_ed25519 > /dev/null
 
+      - name: SSH 연결 테스트 (디버그)
+        run: |
+          ssh -vv -o BatchMode=yes -p ${{ vars.DEPLOY_SSH_PORT }} \
+            ${{ vars.DEPLOY_SSH_USER }}@${{ vars.DEPLOY_SSH_HOST }} echo ok
+
       - name: 소스 동기화
         run: |
           rsync -avz \
             --exclude='.env' --exclude='media' --exclude='__pycache__' \
-            -e "ssh -p ${{ vars.DEPLOY_SSH_PORT }}" \
+            -e "ssh -o BatchMode=yes -p ${{ vars.DEPLOY_SSH_PORT }}" \
             pyproject.toml alembic.ini Dockerfile docker-compose.yml app migrations scripts \
             ${{ vars.DEPLOY_SSH_USER }}@${{ vars.DEPLOY_SSH_HOST }}:${{ vars.DEPLOY_REMOTE_PATH }}/