Yeah for historical links it makes sense to fall back on IAs existing archives, but going forward Wikipedia could take their own snapshots of cited pages and substitute them in if/when the original rots. It would be more reliable than hoping IA grabbed it.

Not opposed, Wikimedia tech folks are very accessible in my experience, ask them to make a GET or POST to https://web.archive.org/save whenever a link is added via the Wiki editing mechanism. Easy peasy. Example CLI tools are https://github.com/palewire/savepagenow and https://github.com/akamhy/waybackpy

Shortcut is to consume the Wikimedia changelog firehose and make these http requests yourself, performing a CDX lookup request to see if a recent snapshot was already taken before issuing a capture request (to be polite to the capture worker queue).