Two separate fixes for bot and cabinet auth paths:
Bot (start.py): store referrer_id from campaign.partner_user_id in FSM
state, skip referral code prompt when partner already set.
Cabinet (auth.py): in _process_campaign_bonus, set user.referred_by_id
to campaign.partner_user_id and call process_referral_registration.
Both paths now correctly attribute campaign users to the partner,
enabling commission earnings from their future purchases.
Fringg
c4dc43e054