Add SystemTest Agent and Controller

SystemTest-Agent/start_agent.bat

@@ -0,0 +1,80 @@
+@echo off
+setlocal EnableExtensions
+cd /d "%~dp0"
+if not "%~1"=="" set "CONTROLLER_URL=%~1"
+set "EXIT_CODE=0"
+
+if not exist "logs" mkdir "logs" >nul 2>nul
+set "LOG_FILE=%~dp0logs\agent_start_latest.log"
+if not defined PYTHONIOENCODING set "PYTHONIOENCODING=utf-8"
+call :set_stamp
+> "%LOG_FILE%" echo [%STAMP%] SystemTest-Agent startup
+>> "%LOG_FILE%" echo Working directory: %CD%
+if defined CONTROLLER_URL >> "%LOG_FILE%" echo CONTROLLER_URL=%CONTROLLER_URL%
+echo Startup log: "%LOG_FILE%"
+
+if defined PYTHON_EXE (
+  if exist "%PYTHON_EXE%" (
+    call :run_python "%PYTHON_EXE%" -u -m app
+    goto :after_run
+  ) else (
+    >> "%LOG_FILE%" echo PYTHON_EXE is set but was not found: %PYTHON_EXE%
+  )
+)
+
+set "CODEX_PYTHON=%USERPROFILE%\.cache\codex-runtimes\codex-primary-runtime\dependencies\python\python.exe"
+if exist "%CODEX_PYTHON%" (
+  call :run_python "%CODEX_PYTHON%" -u -m app
+  goto :after_run
+)
+
+call :run_python python -u -m app
+if not "%EXIT_CODE%"=="0" (
+  call :run_python py -3 -u -m app
+)
+
+:after_run
+if not "%EXIT_CODE%"=="0" (
+  echo.
+  echo SystemTest-Agent exited with code %EXIT_CODE%.
+  echo Full log: "%LOG_FILE%"
+  echo.
+  echo Last log lines:
+  call :show_log_tail
+  echo.
+  echo Common causes:
+  echo   1. Controller is not reachable from this device.
+  echo      Try: start_agent.bat http://^<controller-lan-ip^>:8001
+  echo   2. Python 3 is not installed or not in PATH.
+  echo   3. Local service port 18081 is already in use.
+  echo.
+)
+
+if not "%AGENT_NO_PAUSE%"=="1" (
+  echo.
+  echo SystemTest-Agent stopped. Full log: "%LOG_FILE%"
+  echo Press any key to close this window.
+  pause >nul
+)
+
+:end
+endlocal & exit /b %EXIT_CODE%
+
+:run_python
+echo. >> "%LOG_FILE%"
+call :set_stamp
+echo [%STAMP%] Running: %* >> "%LOG_FILE%"
+%* >> "%LOG_FILE%" 2>&1
+set "EXIT_CODE=%ERRORLEVEL%"
+call :set_stamp
+echo [%STAMP%] Exit code: %EXIT_CODE% >> "%LOG_FILE%"
+exit /b 0
+
+:set_stamp
+for /f "delims=" %%I in ('powershell -NoProfile -Command "Get-Date -Format yyyy-MM-ddTHH:mm:ss"') do set "STAMP=%%I"
+if not defined STAMP set "STAMP=%TIME%"
+exit /b 0
+
+:show_log_tail
+powershell -NoProfile -Command "if (Test-Path -LiteralPath '%LOG_FILE%') { Get-Content -LiteralPath '%LOG_FILE%' -Tail 80 -Encoding UTF8 }"
+exit /b 0