v1.15.1

This patch release delivers a thoroughly audited and hardened backup system, addressing numerous reliability issues and cleaning up related infrastructure.

🐛 Bug Fixes

• Fixed 36 bugs across the backup system following a comprehensive audit
• Resolved backup restore failures and corrected retention policy handling
• Fixed path validation vulnerabilities in backup operations

🔧 Improvements

• Removed unused SFTP server code to reduce attack surface and maintenance burden