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/course/jinrong-module-analyst/modules/02-pipeline.html

@@ -13,9 +13,10 @@
 
       <div class="flow-animation" data-steps='[
         {"highlight":"flow-actor-1","label":"① 消歧：口径字典命中多义指标 → 返回 suggestions 让用户选"},
-        {"highlight":"flow-actor-2","label":"② 生成 SQL：DeepSeek + SCHEMA_PROMPT + 权限域提示","packet":true,"from":"1","to":"2"},
+        {"highlight":"flow-actor-2","label":"② 模板匹配：published 模板填参 → 可跳过 LLM","packet":true,"from":"1","to":"2"},
+        {"highlight":"flow-actor-2","label":"②b 未命中 → DeepSeek + SCHEMA_PROMPT 生成 SQL","packet":true,"from":"1","to":"2"},
         {"highlight":"flow-actor-3","label":"③ SQL 安全校验（sql_guard.py）五层校验：只读 / 表白名单 / 行级归属…","packet":true,"from":"2","to":"3"},
-        {"highlight":"flow-actor-4","label":"④ 执行：AnalyticsRepo 只读查询（Redis 缓存可命中）","packet":true,"from":"3","to":"4"},
+        {"highlight":"flow-actor-4","label":"④ 执行：AnalyticsRepo + Redis 结果缓存（表世代键）","packet":true,"from":"3","to":"4"},
         {"highlight":"flow-actor-5","label":"⑤ guardrail：解读数字必须与表格一致，不过则降级","packet":true,"from":"4","to":"5"},
         {"highlight":"flow-actor-1","label":"⑥ 留痕：analytics_query_log 写入 SQL/耗时/护栏结果","packet":true,"from":"5","to":"1"}
       ]'>