Postgres Version 18 Support

[Unbreathable]

In PostgreSQL 18, the database layout changed and it's now recommended to mount volumes in different places. Therefore, Magic needs a way to migrate your old Postgres containers from versions prior to 18 to the latest version in case that kind of image is used.

Furthermore, Magic should have an internal list of PostgreSQL versions that are supported so something like this doesn't happen again.

[Unbreathable]

Solving this issue is currently difficult and will require a lot of work, we may re-factor Magic again completely, so no concrete plans yet.

[Unbreathable]

It seems this isn't as difficult as I thought, but when this merges, we will have to add a warning that this overwrites your current databases and will delete them since making an automatic migration script would be hell.