To support this also remove ray parallelization from TestOrbitRadiusFilter in favor of
parallelizing the filter_observations function. Adds a
filter_observations_worker that accepts a chunk of state IDs used to
either mask observations in memory or filter observations on disk.

Co-authored-by: Alec Koumjian <[email protected]>

…tore in link_test_orbit and instead do so in filter_observations