As a first step of getting the concept of users into the database,
this creates a (somewhat involved) migration that moves all existing
"users" into a new users table and updates the post table to reference
it.
This migration is not yet finalised and still needs to be updated with
something to handle the concept of anonymous users (which I want to
keep around).
After thinking for a little while I actually think the body of a post
may be more relevant when searching for posts than the thread title.
Right now this is just a hunch and we'll have to find out how it
actually ends up working in real life.
Adds a 'sticky' column to threads and rewrites the thread index to
take sticky markings into account when ordering threads.
Stickies are not yet highlighted in any way in the forum overview.
Adds columns for author names and emails to both threads and posts.
"Users" don't (yet? who knows!) exist as independent entity in
Converse, they are simply "inferred" via OIDC providers.
