Act as a Senior Solutions Architect. Design a comprehensive microservices architecture for a global e-commerce platform expected to handle 500,000 concurrent users during peak events. Your design must include: 1) Service decomposition strategy, 2) API Gateway and communication protocols (synchronous vs asynchronous), 3) Data storage solutions (polyglot persistence), 4) Caching layers (CDN, Redis), 5) Message broker selection for event-driven communication, and 6) Resiliency patterns (circuit breakers, retries, bulkheads). Explain the trade-offs of your technology choices.