ford-obd: ELM327 OBD-II reader + 6.0 Power Stroke no-start triage

Read stored/pending/permanent DTCs, decode with 6.0-relevant codes flagged,
guarded mode-04 clear (--clear), key live PIDs + battery voltage, and a
6.0 no-start triage checklist. Tested against a CH340 ELM327 v1.5 adapter.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016yT89n4zR4qbrySoSiEyZs

RUN_OBD.bat

@@ -0,0 +1,23 @@
+@echo off
+REM ===  6.0 Power Stroke OBD reader launcher  ===
+REM  Double-click this on Windows. It installs pyserial (once) then runs.
+
+where python >nul 2>nul
+if errorlevel 1 (
+  echo Python is not installed or not on PATH.
+  echo Install it from https://www.python.org/downloads/  ^(check "Add Python to PATH"^),
+  echo then double-click this file again.
+  pause
+  exit /b 1
+)
+
+echo Ensuring pyserial is installed...
+python -m pip install --quiet pyserial
+
+echo.
+echo Starting OBD reader. Turn the truck key to RUN ^(engine off is fine^).
+echo If it can't find the port, pass it like:  RUN_OBD.bat COM5
+echo.
+python "%~dp0obd_reader.py" %*
+echo.
+pause