fix(ci): use aliyun apt mirror and trim system deps for docker build

infra/docker/ci.Dockerfile

@@ -8,13 +8,12 @@ ENV PIP_DISABLE_PIP_VERSION_CHECK=1 \
 
 WORKDIR /workspace
 
-# 安装系统依赖（opencv/视频处理需要）
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    libgl1-mesa-glx \
-    libglib2.0-0 \
-    libsm6 \
-    libxext6 \
-    ffmpeg \
+# 换国内apt源（阿里云），解决deb.debian.org访问失败问题
+RUN sed -i 's/deb.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list.d/debian.sources \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends \
+        libglib2.0-0 \
+        libgomp1 \
     && rm -rf /var/lib/apt/lists/*
 
 COPY requirements-quality.txt requirements-dev.txt requirements.txt ./