Multi Tenant Security Architecture Questions

Designing secure multi tenant platforms that prevent cross tenant data leakage and privilege escalation. Topics include tenancy models such as shared schema shared application isolated stacks and hybrid approaches, data partitioning and segmentation strategies, tenant aware authentication and authorization, tenant scoped encryption and key management choices, resource isolation and quota management, tenant aware logging and monitoring, testing and verification of tenant isolation, mitigation of side channel and cross tenant inference attacks, and operational and compliance considerations for onboarding migration and data residency.