Original TOWER.EXE reference captures

Generated by tools/capture_native_tower.py from the unchanged normal 3.42 executable in a disposable installation and private DOSBox/Xvfb session. See ../tower.md for the executable analysis, input contract and verification scope. captures.json preserves each source, airfield, input sequence, complete RGB FNV-1a hash and the selected STARTLOC.DAT contents (or null when absent).

The 49 screenshots include original game briefings and controlled synthetic inputs. Their expectations are imported into corncob-cpp by tools/generate_tower_briefing_reference.py. No C++ output is used to create the native expectations. The normal game build and tests need neither DOSBox nor these research tools.