A solution would be to save the chat log as a text file. An LLM might be able to turn it into FAQ format with little oversight. Of course, someone would still have to volunteer the work.
Obviously, Discord doesn’t want that sort of thing since it lessens their hold on a community and the people in it. They could decide to cause trouble.
You should probably hook up with the SillyTavern crowd. It’s a frontend to chat with LLMs that will do what you want. Its main purpose is chat role-play. You can assign a persona to the LLM and ST will handle the prompt to make it work. It also handles jailbreaks if you want to use one of the big ones (no idea if it works well). You can also connect to other services that run open models, including aihorde.
https://github.com/SillyTavern/SillyTavern
https://www.reddit.com/r/SillyTavernAI/
If you want to host your own model you can find more help here:
https://www.reddit.com/r/LocalLLaMA/
!localllama@sh.itjust.works