feat: 新增工具插件、系统日志、workflow配置及前端优化

1. 新增工具插件(edit_file, python_executor, search_file, shell_executor, write_file)
2. 新增系统事件日志模块和API
3. 新增workflow配置文件和详情API
4. 前端增加SSE、错误边界、设置引导等组件
5. 优化认证加密、速率限制、配置加载等工具模块
6. 删除废弃的cluster和health API
7. 补充单元测试和集成测试

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pyproject.toml

@@ -46,6 +46,9 @@ asyncio_mode = "auto"
 testpaths = ["tests"]
 pythonpath = ["."]
 addopts = "-ra -q --strict-markers"
+markers = [
+    "integration: 端到端 / 组装层 smoke 测试（不依赖真 ray / postgres）",
+]
 filterwarnings = [
     "ignore::DeprecationWarning",
 ]