Fix mentions after user changes their username

[Gabriel Torres]

Hi,

The platform allows the user to change their username by themselves. Howerver, mentions in posts, reviews, private messages, etcetera are kept with their old name.

This is a problem for privacy. A very common reason people are changing their username is to change their account from their real name to a nickname. However, all mentions are kept with their old (real) name, allowing them to be identified.

Due to recent privacy laws in our country (LGPD), we need to be able to fix this more easily.

Wehenever a user complains about that, we run a couple of mysql queries to manually fix the issue, but it would be great that, whenever a user changes their name, the platform itself triggered the necessary queries.

Thanks!