Improve bounding boxes used by railviz #249

Job	Run time
msvc (Debug)	4m 6s
macos (macos-x86_64, On)	6m 50s
formatting	46s
msvc (Release)	4m 2s
linux (linux-amd64-release, linux-amd64)	1m 4s
macos (macos-arm64)	11m 3s
linux (clang-tidy)	2m 11s
linux (linux-sanitizer)	1m 50s
openapi-validate	19s
ui	34s
linux (linux-debug, valgrind --suppressions=tools/suppress.txt --leak-check=full --error-exitcode=1)	4m 12s
docker	23s
	37m 20s

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