Rename the session_id to group_id in kvstores table in the SQL store, to
better represent how the field is actually used.
Note that this is a breaking change, and would normally require a new
migration. But as the SQL store is not used in production, and only
enabled under the dev build flag, we can rename it without a new
migration, as there's no users of the SQL store in production.
In this commit we define the schema for the `actions` table along with
various queries we will need for interacting with the table. NOTE: we
will also add some of our own queries manually in commits to follow.
Replace any named UNIQUE indices in the accounts tables and replace with
named ones. This is for a future where we want to be able to edit these
indices without having to drop the table.
It is fine for us to just edit these tables since these are not
available in "prod" yet.
This commit also contains the sqlc.yaml file, the `make sqlc` command
and the script for generating sqlc code. This must be done in this
commit as the script only works if there are queries to generate from.
