Discuss the database design choices for a microservices architecture that requires event sourcing. How would you manage the storage of events and ensure data integrity?

``` I would use a combined approach of a relational database for structured data and a NoSQL database for storing event logs, ensuring that events are immutable and ordering is maintained through a designated event store. Scenario Pressure: Consider how you would handle eventual consistency across services consuming these events to avoid data integrity issues. Depth Trigger: Discuss strategies for handling event schema evolution as the microservices evolve. ```