Write comprehensive technical documentation for a large-scale microservices architecture supporting an e-commerce platform with 50+ services. Your documentation should include: a high-level system overview diagram (described textually), service dependency mapping, data flow diagrams, fault tolerance and recovery mechanisms, authentication/authorization approach, monitoring strategy, deployment pipeline, and scaling policies. Address how the system handles partial failures, data consistency requirements, and service evolution over time. Include sections on troubleshooting common issues and disaster recovery procedures.