#AI commit# CC: 提交REQ-03自定义任务变量参数需求说明与设计说明文档（开源版），需求文档定义P0 DSS动态变量注入+E1-E4增强点，设计文档给出appconn/server两端代码变更方案与JobParamValidator工具类实现 / Commit REQ-03 custom task variable params requirement and design docs (open-source); requirement doc defines P0 DSS dynamic variable injection + E1-E4 enhancements, design doc provides two-ended appconn/server code change plan and JobParamValidator utility implementation

Author: Davidhua1996