feat(threshold): Implement customer loss threshold configuration and notification system

- Added `ThresholdRepository` for managing customer loss threshold configurations and notifications.
- Introduced `threshold_service` to handle loss threshold alerts based on customer portfolio performance.
- Enhanced `customer_prompts` to include new intent for querying product net values.
- Updated `customer_service` to integrate new threshold alert functionality into existing workflows.
- Implemented `sanitize_postprocess` for improved compliance handling in customer interactions.
- Enhanced course documentation to reflect updates in advisor training modules and interactive elements.

This update significantly improves the customer experience by providing proactive loss threshold notifications and enhancing the overall service framework.

docs/memory/REQUIREMENTS.md

@@ -56,6 +56,13 @@
 
 | ID | 需求 | 验收对照 | 状态 | TODO |
 | --- | --- | --- | --- | --- |
-| C-01~C-05 | 持仓/产品/规则/阈值/净值 | 无买卖指导 | 未做 | T-40 |
+| C-01 | 持仓查询 | Core 只读 fact_text · 无买卖指导 | **已实现** · `holding_query` | ~~T-40~~ |
+| C-02 | 产品规则咨询 | fin_product RAG + 免责 | **已实现** · Wave1~2 | — |
+| C-03 | 政策/FAQ | fin_policy / fin_faq RAG | **已实现** · Wave1~2 | — |
+| C-04 | 亏损阈值提醒 | `customer_threshold_config` + 持仓查询追加提醒 | **已实现（2026-09-10）** · `threshold_service` | ~~T-40~~ |
+| C-05 | 产品净值 | Core 最新净值快照；禁止实时盘口 | **已实现（2026-09-10）** · `nav_query`；「实时净值」reject | ~~T-40~~ |
+| C-07 | 风评查询 / 重测引导 | Core L0；重测引导 App/网点 | **部分已实现** · 无 Agent 内问卷 | T-41 |
+| C-08 | 配置目标 | L1 槽 `allocation_target` | **部分已实现** · 无偏离检测/调仓 | T-41 |
+| C-11 | 适当性匹配说明 | 非营销推荐；联动 R-02 | **部分已实现** · 「我能买什么」→ suitability；「推荐稳赚」仍 reject | T-42 |
 
-P1+ 见 `docs/需求拆解/业务场景优先级清单.md` §3。
+**Wave 3 未做：** 主动 push/cron 阈值通知 · Phase B 行情 sync · GraphRAG 式推荐 · 自动调仓。