I was about to suggest the spam detection of the ai plugin as that also checks edits for spam and does a great job here on Meta. Someone recently shared some impressive numbers, but I think the topic was deleted or unlisted (or I am really bad at searching today).
But I am not sure if knowing that this plugin exists or telling you about other features added in the past year to handle massive spam waves is any help to you, as it looks like the version of that forum is quite outdated (October 2023).