test_setup_bat_files.py asserted that run_asset_extractor.bat and
run_quest_debug.bat exist in the repo root. Those are developer tools that
the end-user `stable` branch deliberately strips, so a fresh clone of
stable shipped 4 failing tests even though the bot was fine.
Split the list into CORE_BATS (install/find_python/run_botty -- required on
every branch) and OPTIONAL_BATS (dev tooling -- validated only when
present). The username, absolute-path and find_python checks now iterate
over the files that actually exist rather than a hardcoded list.
Found by cloning stable from GitHub onto a clean machine and running the
suite as a new user would.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
