增加支付逻辑

backend/internal/migrations/sql/0004_seedream_billing_provider.sql

@@ -0,0 +1,14 @@
+-- Allow the independently routed Ark Seedream image provider in the durable
+-- billing catalog. Keep the historical migration immutable and widen only the
+-- existing provider constraint.
+
+begin;
+
+alter table public.billing_price_rules
+  drop constraint if exists billing_price_rules_provider_check;
+
+alter table public.billing_price_rules
+  add constraint billing_price_rules_provider_check
+  check (provider in ('volcengine-visual', 'evolink', 'seedance', 'seedream', 'bailian', 'mock'));
+
+commit;