fix: close durable queue and runtime gaps

packages/queue/src/configured.ts

@@ -46,7 +46,7 @@ function lazyStore(resolve: () => Promise<QueueStore>): QueueStore {
       return (await ready()).list(name);
     },
     async findByIdempotencyKey(name, key) {
-      return (await ready()).findByIdempotencyKey?.(name, key) ?? null;
+      return (await ready()).findByIdempotencyKey(name, key);
     },
     async size() {
       return (await ready()).size?.() ?? (await (await ready()).list()).length;