liaozhaorun 0a16129548 feat(factors): 添加因子计算框架 ...

- 新增因子基类 (BaseFactor, CrossSectionalFactor, TimeSeriesFactor)
- 新增数据规格和上下文类 (DataSpec, FactorContext, FactorData)
- 新增数据加载器 (DataLoader) 和执行引擎 (FactorEngine)
- 新增组合因子支持 (CompositeFactor, ScalarFactor)
- 添加因子模块完整测试用例
- 添加 Git 提交规范文档

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..

code_review_factors_20260222.md

feat(factors): 添加因子计算框架

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factor_framework_design.md

feat(factors): 添加因子计算框架

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factor_implementation_plan.md

feat(factors): 添加因子计算框架

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hdf5_to_duckdb_migration.md

feat(factors): 添加因子计算框架

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