Design a system to display aggregation of events where multiple robots are continuously generating events in realtime

Design a Time Reordering Queue System The system receives events from multiple independent sources. Each event contains a timestamp. The system should expose an API that returns events ordered by timestamp in descending order. It must be capable of handling up to 1 million events per second. Consider how to handle out-of-order (late) or boundary events efficiently. The interviewer expects discussion around file-based storage, scalability, and system design principles — including data flow, parallel processing, configuration management, and reasoning behind key configuration choices.