alter table user_invitations
    add column if not exists token_hash text,
    add column if not exists accepted_by_user_id uuid references users(id);

create unique index if not exists idx_user_invitations_token_hash
    on user_invitations (token_hash)
    where token_hash is not null;

create table if not exists password_reset_tokens (
    id uuid primary key,
    user_id uuid not null references users(id) on delete cascade,
    token_hash text not null unique,
    expires_at timestamptz not null,
    used_at timestamptz,
    created_at timestamptz not null default now()
);

create index if not exists idx_password_reset_tokens_user
    on password_reset_tokens (user_id, expires_at);

alter table email_outbox
    add column if not exists subject text,
    add column if not exists delivered_via text;