PromotionTypeChoices was an empty enum, so Recipient.promotion_type could
never hold a real value and every payout without an explicit
Recipient.wallet_uuid fell through to the same default wallet regardless of
what kind of promotion it was.
Give PromotionTypeChoices real values (first_ad_view, capture,
first_ad_create) and branch Recipient.get_wallet_category_uuid() on it:
first_ad_view (or unset) still pays into the user's cash-like reward wallet
(WALLET_USER_BILLBOARD_VISIT_INCOME); capture/first_ad_create are billboard/ad
credit, not a cash reward, so they route to the new WALLET_ADVERTISING_TRANSIT
setting (same wallet-service UUID as the advertising repo's own setting of
that name) instead. An explicit Recipient.wallet_uuid still wins over
promotion_type.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>