Act as a Principal Software Engineer. Design a distributed system architecture for a real-time bidding platform that must handle 100,000 requests per second with latency under 100ms. Your design must address data consistency, fault tolerance, and eventual consistency models. Compare the trade-offs between using Apache Kafka and Apache Pulsar for the message streaming layer. Provide a detailed breakdown of the service interaction diagram, database sharding strategy, and a disaster recovery plan. Include pseudo-code for handling a network partition scenario.