fix(ci): SSH 개인키 파일에서 CR 제거 (Windows CRLF 시크릿 대응)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/deploy.yaml

@@ -51,7 +51,7 @@ jobs:
           fi
 
           mkdir -p ~/.ssh && chmod 700 ~/.ssh
-          printf '%s\n' "$DEPLOY_SSH_KEY" > ~/.ssh/id_deploy
+          printf '%s\n' "$DEPLOY_SSH_KEY" | tr -d '\r' > ~/.ssh/id_deploy
           chmod 600 ~/.ssh/id_deploy
           ssh-keyscan -p "$PORT" "$DEPLOY_HOST" >> ~/.ssh/known_hosts 2>/dev/null
           SSH="ssh -p $PORT -i $HOME/.ssh/id_deploy -o StrictHostKeyChecking=yes"