本轮完成全树技能划分与先修依据复核，更新为 192 个学习单元。 原有 9 个“前置待核实”：7 个补官方课程证据，2 个并入 DevOps / 数据工程。当前 192/192 已核，260 条必须前置、400 条推荐前置。 合并过细的算法、数据工程、数据科学和供应链内容；拆出排队论。

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