把 Arcana Evaluation telemetry 转换为 CMDC EventBus plugin event。
监听事件:
[:arcana, :evaluation, :start][:arcana, :evaluation, :test_case, :start][:arcana, :evaluation, :test_case, :complete]
配置 session_id 后会广播 {:plugin_event, :rag_eval_progress, payload}。