create table if not exists projects (
  id             bigserial   primary key,
  guid           uuid        not null default gen_random_uuid(),
  name           text        not null unique,
  description    text,
  created_at     timestamptz default now(),
  last_active_at timestamptz default now(),
  constraint projects_guid_unique unique (guid)
);

alter table thoughts add column if not exists project_id uuid references projects(guid);
alter table thoughts add column if not exists archived_at timestamptz;

create index if not exists thoughts_project_id_idx on thoughts (project_id);
create index if not exists thoughts_archived_at_idx on thoughts (archived_at);