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Scenario: You are designing a messaging system using Pub/Sub to process clickstream data with an event-driven consumer application. The consumer app uses a push subscription. The system must reliably handle temporary downtime of the consumer app, store unprocessed messages, and retry failed messages without overloading the consumer app. Failed messages should be stored in a topic after a maximum of 10 retries. Question: How should you configure the Pub/Sub subscription to meet the requirements?