feat(system): 计提公式模板注册表与精确分数计算函数

- formula.py 八个纯函数:回款天数(首日计1)、业务员分段递减(360=6‰/361=4‰)、折算毛利润额化简式(防除零)、乘法方向绩效、以物抵顶/R×R/起付
- param_registry.py:16 项参数元数据(与迁移种子同源)+ Fraction 精确解析(4/360 禁截断)+ 类型/取值域/枚举校验
- calc_templates.py:5 个公式模板注册表(岗位绑定的受控集合)
- 新增 43 项单元用例:精确分数断言(899/90000、27 天、9/25),畸形值拒绝

Co-Authored-By: Claude Code <noreply@anthropic.com>
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liuwenxinandClaude Code committed 2026-10-12 16:22:32 +08:00
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@@ -37,6 +37,15 @@ PASSWORD_MAX_BYTES = 72
CAPTCHA_CHARSET = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ"
CAPTCHA_LENGTH = 4
# ===== 业务岗位编码(与 db/migration 种子一致,business_roles.role_code)=====
BUSINESS_ROLE_SALESPERSON = "salesperson"
BUSINESS_ROLE_SALES_MANAGER = "sales_manager"
BUSINESS_ROLE_INFO_OFFICER = "info_officer"
# ===== 产品类别码(与 param_values.dimension_value 口径一致)=====
PRODUCT_CATEGORY_MUNICIPAL_WATER = "municipal_water"
PRODUCT_CATEGORY_RAIL_TRANSIT = "rail_transit"
# ===== 操作日志词表(operation_logs 的 module / action 取值)=====
# 集中定义避免各处硬编码导致日志值漂移;前端筛选下拉项与此保持一致
MODULE_USER = "用户管理"