chore: add project analysis doc, clean up legacy scripts, update docs

- Add comprehensive project analysis document (项目分析文档.md)
- Add Windows startup guide and batch script
- Replace legacy startup scripts with run_production.py (Waitress)
- Remove deprecated bat scripts and duplicate run files
- Update .env.example, README.md, and docs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/README.md

@@ -80,7 +80,7 @@ python init_db.py
 python run_dev.py
 ```
 
-访问 http://localhost:5000 开始使用
+访问 http://localhost:5002 开始使用。仅 Windows 本机启停见仓库根目录 `windows上唯一启动说明.md` 与 `windows启动.bat`。
 
 ## 项目结构