Include unique ID that doesn't change in slug

[sidemt]

This is more of a need for the 11ty and front-end apps.

We would want to design the slug such that it always contains a unique ID in the following format:

https://freecodecamp.org/news/my-awesome-article-12ab4c56

where the 12ab4c56 is an 8-char hexadecimal unique id.

For inspiration, the forum URLs look like so:

• https://forum.freecodecamp.org/t/announcement-hacktoberfest-2023-contribute-to-freecodecamp/641747
• https://forum.freecodecamp.org/t/announcement-hacktoberfest-2023/641747
• https://forum.freecodecamp.org/t/announcement/641747
• https://forum.freecodecamp.org/t/announcement2023-contribute-to/641747

These all lead to https://forum.freecodecamp.org/t/641747

Because the forum software (discourse) ignores the slug and uses the topic number.

[sidemt]

@raisedadead Do we want it to be
https://freecodecamp.org/news/my-awesome-article-12ab4c56
or
https://freecodecamp.org/news/my-awesome-article/12ab4c56?

- or / for separating my-awesome-article and 12ab4c56

[raisedadead]

I prefer the former format with the -. The / are a pain to handle as is.

[sidemt]

OK, thank you for confirming.

[sidemt]

(Note) Reasons behind this:

• We don’t want to expose the default ID for extra safety
• We don’t want to set redirect every time user changes the slug of the published articles
• We can switch to other backend system if we need to in the future

[sidemt]

(Meeting notes) We don't need slug-id for other models such as users or tags.
The main purpose of adding it is to make URLs available even after changing the slug. It's less likely authors change their username frequently.