chore: exclude mlx from container requirements (Apple Silicon only)

Made-with: Cursor

Dockerfile

@@ -7,6 +7,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt .
+# mlx는 Apple Silicon 전용이므로 컨테이너에 설치하지 않는다
 RUN pip install --no-cache-dir -r requirements.txt
 
 COPY . .