Elliott Biondo

@sethrj since this does not cause any additional failures in `models/analysis/orange-complexity.ipynb` relative to develop, I think you can continue your review.

Maybe whatever CI job runs Codecov could be down without compiler optimizations. That would eliminate having to decorate the code with pragmas for loops that may be unrolled, for example.

@osanstrong this is shaping up nicely. Ping us whenever you are ready for us to take another look.

The automatic tests are the CI (continuous-integration) tests. The one that is failing for you is `noble-arm-clang-18-c++20` which means: noble : Ubuntu 24.04, "Noble Numbat" arm : processor using ARM...

@osanstrong @sethrj I think compiling with `CELERITAS_REAL_TYPE=float` is going to be the best bet. Your tolerances are going to have to be loose enough that the code passes using `float`...