AWS msk documentation change
Summary
Renamed and repurposed file from 'msk-replicator-prepare-target-cluster.md' to focus on retention period best practices. Content changed from preparing target clusters to discussing log retention periods (recommended 7 days) with updated links.
Security assessment
This is a documentation restructuring where a file was renamed and its content completely changed. The new content about log retention periods is a general operational best practice, not specifically security-related. No security vulnerabilities or security features are mentioned in the changes.