Reduce complexity by making short-term password reset tokens use UUIDs only.

[dessalines]

Requirements

• Is this a feature request? For questions or discussions use https://lemmy.ml/c/lemmy_support
• Did you check to see if this issue already exists?
• Is this only a feature request? Do not put multiple feature requests in one issue.
• Is this a backend issue? Use the lemmy-ui repo for UI / frontend issues.

Is your proposal related to a problem?

Right now, password reset tokens, which used to use randomly generated UUIDs, are now being pointlessly hashed using SHA256. These tokens shouldn't live more than a day, and are only emailed to that users email directly, so hashing is pointless here.

Describe the solution you'd like.

The resets should:

• Just use and check postgres-generated UUID columns.
• Add a scheduled job to delete these reset rows after a day.

Describe alternatives you've considered.

N/A

Additional context

#3388