feat(build): 添加离线构建支持

- 新增 build-offline.sh 脚本实现无网环境构建
- 添加离线版 Dockerfiles 使用本地资源替代网络下载
- 创建 export-cache.sh 脚本在有网环境预下载依赖
- 集成 Makefile.offline.mk 提供便捷的离线构建命令
- 添加详细的离线构建文档和故障排查指南
- 实现基础镜像、BuildKit 缓存和外部资源的一键打包

scripts/offline/Dockerfile.runtime.offline

@@ -0,0 +1,54 @@
+# runtime Dockerfile 离线版本
+# 修改点: 使用本地模型文件替代 wget 下载
+
+FROM ghcr.nju.edu.cn/astral-sh/uv:python3.11-bookworm
+
+# 配置 apt 阿里云镜像源
+RUN --mount=type=cache,target=/var/cache/apt \
+    --mount=type=cache,target=/var/lib/apt \
+    if [ -f /etc/apt/sources.list.d/debian.sources ]; then \
+        sed -i 's/deb.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list.d/debian.sources; \
+    elif [ -f /etc/apt/sources.list ]; then \
+        sed -i 's/deb.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list; \
+    fi \
+    && apt update \
+    && apt install -y libgl1 libglib2.0-0 vim libmagic1 libreoffice dos2unix swig poppler-utils tesseract-ocr
+
+# 离线模式: 本地模型文件路径
+ARG RESOURCES_DIR=./build-cache/resources
+ARG MODELS_DIR=${RESOURCES_DIR}/models
+
+# 复制本地 PaddleOCR 模型（离线环境预先下载）
+RUN mkdir -p /home/models
+COPY ${MODELS_DIR}/ch_ppocr_mobile_v2.0_cls_infer.tar /home/models/
+RUN tar -xf /home/models/ch_ppocr_mobile_v2.0_cls_infer.tar -C /home/models
+
+COPY runtime/python-executor /opt/runtime
+COPY runtime/ops /opt/runtime/datamate/ops
+COPY runtime/ops/user /opt/runtime/user
+COPY scripts/images/runtime/start.sh /opt/runtime/start.sh
+
+ENV PYTHONPATH=/opt/runtime/datamate/
+ENV UV_EXTRA_INDEX_URL="https://download.pytorch.org/whl/cpu"
+ENV UV_INDEX_STRATEGY=unsafe-best-match
+# 配置 uv 使用阿里云 PyPI 镜像
+ENV UV_INDEX_URL="https://mirrors.aliyun.com/pypi/simple/"
+
+WORKDIR /opt/runtime
+
+# 复制本地 spaCy 模型（离线环境预先下载）
+COPY ${MODELS_DIR}/zh_core_web_sm-3.8.0-py3-none-any.whl /tmp/
+
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv pip install -e .[all] --system \
+    && uv pip install -r /opt/runtime/datamate/ops/pyproject.toml --system \
+    && uv pip install /tmp/zh_core_web_sm-3.8.0-py3-none-any.whl --system \
+    && echo "/usr/local/lib/ops/site-packages" > /usr/local/lib/python3.11/site-packages/ops.pth
+
+RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
+    && chmod +x /opt/runtime/start.sh \
+    && dos2unix /opt/runtime/start.sh
+
+EXPOSE 8081
+
+ENTRYPOINT ["/opt/runtime/start.sh"]