## About The Pull Request
Using `src` as a trait source is an error and can often lead to
hard-deletes
If you wish to tie a source to a certain datum, it is common to use
`REF(src)` instead.
Ideally, we would lint or test for any use of a reference rather than a
string in use in trait sources, but that's a bit harder to setup.
Currently (from what I can see) the *only* erroneous use of references
as sources are via `src`, so it being the most common error, I see it
fine to lint for it.
## Changelog
Nothing player facing.
43673e2cdf