### Before submitting - [x] I've searched [open issues](issues?q=is%3Aissue%20state%3Aopen%20type%3AFeature) and found no similar request - [x] I'm willing to start a discussion or contribute code ### Problem / motivation - Validation errors should link to URLs in the docs - The validity of these URLs should be checked by a Makefile target and during CI - We should also support mkdocs-redirect for obsolete slugs ### Proposed solution _No response_ ### Alternatives considered _No response_ ### Would you like to help implement this feature? None