feat(chat): Enhance session management with new API endpoints and filtering options

- Added `status` query parameter to `list_sessions_api` for filtering sessions by their status (active/closed).
- Introduced `close_all_sessions_api` endpoint to allow users to close all active sessions for the current actor.
- Updated `SessionRepository` to support status filtering in session listing and implemented logic for closing active sessions.
- Improved Redis connection settings for better performance and reliability.

This update enhances the chat functionality by providing more control over session management, improving user experience and system efficiency.

docs/memory/REQUIREMENTS.md

@@ -60,7 +60,7 @@
 | 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-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 · **无 Chat 历史走势曲线**；统计趋势见问数 self 域（合并说明 §9.6） | ~~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 |