Better constraint weight

The weights for constraints are not an exact science, but still contribute to the error reporting experience. Experimenting with them to get more helpful errors would probably be a good idea.

Cheers

The issue names no files, tests, or entry points. First locate the constraint-weighting logic and existing error-reporting tests, then establish which weight changes produce more helpful errors before making a focused change.

Written by the indexing model from the issue text.