-- CM-2 Part B: per-interest, per-berth deal-price override.
-- Null = use the berth's canonical list price (berths.price). When set, this
-- supersedes the list price for THIS interest's generated documents
-- (resolved in eoi-context via resolveBerthPriceForInterest).
ALTER TABLE interest_berths
  ADD COLUMN IF NOT EXISTS price_override numeric,
  ADD COLUMN IF NOT EXISTS price_override_currency text;
