fix(deploy): add start.bat for Windows NSSM service

start.bat was created manually on the server but not tracked in git.
git clean -fd in update.ps1 deleted it, preventing service restart.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

start.bat

@@ -0,0 +1,9 @@
+@echo off
+REM Start GoMag Import Manager - Windows (NSSM service)
+cd /d "%~dp0"
+
+set TNS_ADMIN=C:\roa\instantclient_11_2_0_2
+set PATH=C:\app\Server\product\18.0.0\dbhomeXE\bin;%PATH%
+
+cd api
+"%~dp0venv\Scripts\python.exe" -m uvicorn app.main:app --host 0.0.0.0 --port 5003