feat(pricing): 开发定价方案

packages/database/migrations/048_store_pricing_invalidation.sql

@@ -0,0 +1,10 @@
+SET search_path TO atlas, public;
+
+-- 币种变化影响售价含义；历史快照保留，发布必须重新确认。
+CREATE FUNCTION invalidate_store_currency_pricing() RETURNS trigger LANGUAGE plpgsql SET search_path = atlas, public AS $$
+BEGIN
+    UPDATE product_variant_platform_listings SET pricing_valid=false WHERE store_id=NEW.id;
+    RETURN NEW;
+END $$;
+CREATE TRIGGER store_currency_pricing_changed AFTER UPDATE OF currency_code ON stores
+FOR EACH ROW WHEN (OLD.currency_code IS DISTINCT FROM NEW.currency_code) EXECUTE FUNCTION invalidate_store_currency_pricing();