This also forbids AI assisted code review

It's worded a bit weirdly, but they explicitly allow it. In the chapter A matter of interpretation they say:

"Moreover, the use of AI for purposes other than co-authoring code, tickets, emails, and so on, is discouraged but not prohibited. If you use LLMs privately to review your work, to ask questions of, to perform security analysis, and so on, and then write original code to push to SourceHut, your use-case is aligned with our policy."