fix(routing): preserve explicit cron account and bound message defaults

Co-authored-by: lbo728 <72309817+lbo728@users.noreply.github.com>
Co-authored-by: stakeswky <64798754+stakeswky@users.noreply.github.com>

src/gateway/protocol/schema/cron.ts

@@ -138,6 +138,7 @@ export const CronPayloadPatchSchema = Type.Union([
 
 const CronDeliverySharedProperties = {
   channel: Type.Optional(Type.Union([Type.Literal("last"), NonEmptyString])),
+  accountId: Type.Optional(NonEmptyString),
   bestEffort: Type.Optional(Type.Boolean()),
 };