I went with the strategy of using the included or excluded ids to reduce the candidate fid sets at the beginning of the fid selection. If an impossible fid is requested, no candidates will remain and no fids will be selected. This seemed reasonable for the use cases (though may not work to manually select fid sets used in previous undercover observations with off-CCD fids).
Description
Add include/exclude of fids by index/id
I went with the strategy of using the included or excluded ids to reduce the candidate fid sets at the beginning of the fid selection. If an impossible fid is requested, no candidates will remain and no fids will be selected. This seemed reasonable for the use cases (though may not work to manually select fid sets used in previous undercover observations with off-CCD fids).
Testing