AWS snowball medium security documentation change
Summary
Renamed file, added deprecation notice for Snowball Edge, corrected IAM policy examples (KMS resource ARNs and quote formatting), and restructured content.
Security assessment
Corrected IAM policy examples fix security misconfigurations by properly scoping KMS 'Decrypt' permissions to specific keys (previously used S3 ARNs). This prevents potential over-permissioning. Quote formatting fixes ensure valid JSON policies.