How does Catalyst's approach to idempotency differ from Restate's built-in deduplication for external calls?

Restate provides built-in deduplication for external calls via journaled services, reducing the need for application-level idempotency. Catalyst, like Temporal, relies on application-level idempotency or reconciliation. Choose Restate if you want platform-managed deduplication for simple calls; choose Catalyst if you need framework-agnostic agent runners and MCP tool policy, even though idempotency remains your responsibility.