Yeah at the margin these things will always be somewhat arbitrary. I would fall on the side of data science is not programming. The purpose of data science (aka practical statistical analysis) is to perform some data transform with a purpose being to provide insight on the world. Programming (in haskell or any other language) is a tool to achieve that insight into crop yields or sales figures or economic policy effect or whatever.

How I'd go on the "used for programming question"

A database of haskell libraries - used for programming - rejected.

A database used as storage for a web site shopfront - used for a web site shop front (or data that isn't to assist a programmer doing programming) - accepted.