增强 8910 日志盯盘与联调可读性：本机落盘 info/error、bat 入口，出站与 echo 打 reply 预览，部署强制 UTF-8。

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/_remote_safe_deploy_agent.ps1

@@ -75,6 +75,8 @@ $runHttp = @(
   ('cd /d "' + $AgentCurrent + '"'),
   'set YTD_ENV=test',
   'set AGENT_HTTP_PORT=8910',
+  'set PYTHONUTF8=1',
+  'set PYTHONIOENCODING=utf-8',
   ':loop',
   ('"' + $venvPy + '" -m agent.http_app >> "' + $logHttpOut + '" 2>> "' + $logHttpErr + '"'),
   ('echo agent exited, restart in 3s >> "' + $logHttpErr + '"'),
@@ -87,6 +89,8 @@ $runWorker = @(
   '@echo off',
   ('cd /d "' + $AgentCurrent + '"'),
   'set YTD_ENV=test',
+  'set PYTHONUTF8=1',
+  'set PYTHONIOENCODING=utf-8',
   ':loop',
   ('"' + $venvPy + '" -m agent.worker_app >> "' + $logWorkerOut + '" 2>> "' + $logWorkerErr + '"'),
   ('echo worker exited, restart in 3s >> "' + $logWorkerErr + '"'),