fix: auto-fix code issues (cron)

- 修复重复导入/字段
- 修复异常处理
- 修复PEP8格式问题
- 添加类型注解

AUTO_CODE_REVIEW_REPORT.md

@@ -1,6 +1,6 @@
 # InsightFlow 代码审查报告
 
-扫描时间: Sun Mar  1 06:03:17 AM CST 2026
+扫描时间: Sun Mar  1 09:10:50 AM CST 2026
 扫描文件数: 40
 
 ## 扫描的文件列表
@@ -51,35 +51,12 @@
 - 🔴 Critical: 3
 - 🟠 Error: 0
 - 🟡 Warning: 6
-- 🔵 Info: 2249
-- **总计: 2258**
+- 🔵 Info: 2225
+- **总计: 2234**
 
 ## ✅ 已自动修复的问题
 
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:20` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:28` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:48` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:68` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:88` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:101` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:111` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:1397` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/db_manager.py:1400` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/tingwu_client.py:11` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/rate_limiter.py:15` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/rate_limiter.py:23` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/rate_limiter.py:32` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/rate_limiter.py:63` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/rate_limiter.py:158` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/rate_limiter.py:161` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/rate_limiter.py:170` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/rate_limiter.py:212` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/llm_client.py:18` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/llm_client.py:23` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/llm_client.py:30` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/llm_client.py:37` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/llm_client.py:257` - 多余的空行
-- `/root/.openclaw/workspace/projects/insightflow/backend/llm_client.py:260` - 多余的空行
+无
 
 ## ⚠️ 需要人工确认的问题
 
@@ -94,9 +71,9 @@
 
 ### duplicate_import
 
-- `/root/.openclaw/workspace/projects/insightflow/backend/tingwu_client.py:81` - 重复导入: from alibabacloud_tea_openapi import models as open_api_models
-- `/root/.openclaw/workspace/projects/insightflow/backend/tingwu_client.py:82` - 重复导入: from alibabacloud_tingwu20230930 import models as tingwu_models
-- `/root/.openclaw/workspace/projects/insightflow/backend/tingwu_client.py:83` - 重复导入: from alibabacloud_tingwu20230930.client import Client as TingwuSDKClient
+- `/root/.openclaw/workspace/projects/insightflow/backend/tingwu_client.py:80` - 重复导入: from alibabacloud_tea_openapi import models as open_api_models
+- `/root/.openclaw/workspace/projects/insightflow/backend/tingwu_client.py:81` - 重复导入: from alibabacloud_tingwu20230930 import models as tingwu_models
+- `/root/.openclaw/workspace/projects/insightflow/backend/tingwu_client.py:82` - 重复导入: from alibabacloud_tingwu20230930.client import Client as TingwuSDKClient
 
 ### extra_blank_line