FAQ/Learning-Paths accessible despite deing disabled

[JanaNF]

Describe the bug

When an old message in a communication channel references the FAQ page, it is possible to access the page even if it has been disabled.

I talked with @krusche, and he said that for every feature we can disable (e.g. FAQ, learning paths), an error message/page (e.g. 404) should show up and you should not be able to access the pages. The REST calls should not return any data.

To Reproduce

1. Enable the FAQ page
2. Write a message in a public channel and reference/link to the FAQ page.
3. Send the message
4. Disable the FAQ page
5. Go back to your message and click on the link
6. You can now see the FAQ page

Expected behavior

If the FAQ page is disabled, it should not be accessible via any route or link.
The page should return a 404 or similar error indicating that the page is not available or that the route is not reachable.

Screenshots

No response

Which version of Artemis are you seeing the problem on?

7.6.5

What browsers are you seeing the problem on?

Chrome

Additional context

This behavior is consistent with Artemis' default settings, as confirmed by @timin a discussion about the PR (PR #9566).
The same issue applies to other features, such as Learning Paths, where disabled routes remain accessible without an appropriate error message.

Relevant log output

No response