fix(data): 修复财务因子计算非确定性问题

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重构 financial_loader 的去重逻辑，确保截面排名计算的股票集合一致：
- 引入"高水位线"算法剔除陈旧历史财报（解决2026年发布2021年财报的问题）
- 改变去重策略：按报告期(end_date)而非更新标识(update_flag)保留最新数据
- 扩展回看期从1年到2年，防止ST/停牌公司财报缺失
- 确保相同交易日在不同查询范围下返回一致的财务数据

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liaozhaorun

2026-03-08 20:58:35 +08:00

parent 3c7795f630

commit 505279c08b

5 changed files with 480 additions and 2853 deletions

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docs/plan/training_module_plan.md

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