refactor(cleanup): remove legacy CLI and complete EvoAgent migration cleanup

- Delete backend/cli.py and all CLI-specific tests (test_cli.py,
  test_openclaw_cli_service.py, test_skills_cli.py)
- Remove evotraders console script from pyproject.toml
- Update README/CLAUDE.md to reference python backend/main.py instead of CLI
- Add pytest-asyncio to dev dependencies
- Enhance EvoAgent with reload_runtime_assets and backward-compat attrs
- Align tests with updated API semantics and gateway process models

Constraint: CLI is deprecated in favor of split-service runtime model
Confidence: high
Scope-risk: moderate

CLAUDE.md

@@ -16,12 +16,14 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 # 安装依赖
 uv pip install -e .
 
-# 运行命令
-evotraders backtest --start 2025-11-01 --end 2025-12-01  # 回测模式
-evotraders backtest --start 2025-11-01 --end 2025-12-01 --enable-memory  # 带记忆回测
-evotraders live                              # 实盘交易
-evotraders live -t 22:30                     # 定时每日交易
-evotraders frontend                          # 启动可视化界面
+# 运行回测 / 实盘
+python backend/main.py --mode backtest --config-name smoke_fullstack --start-date 2025-11-01 --end-date 2025-12-01
+python backend/main.py --mode backtest --config-name smoke_fullstack --start-date 2025-11-01 --end-date 2025-12-01 --enable-memory
+python backend/main.py --mode live --config-name live
+python backend/main.py --mode live --config-name live --trigger-time 22:30
+
+# 启动前端
+cd frontend && npm run dev
 
 # 开发服务器
 ./start-dev.sh  # 启动全部 4 个微服务 (agent, runtime, trading, news)