fix(tkeg): Dockerfile에 logs 디렉토리 생성 추가 (non-root 권한 오류 수정)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tkeg/api/Dockerfile

@@ -11,6 +11,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 RUN groupadd -r appuser && useradd -r -g appuser appuser
 COPY --chown=appuser:appuser . .
+RUN mkdir -p /app/logs && chown appuser:appuser /app/logs
 
 ENV PYTHONPATH=/app