New RPC endpoints:
- backup.upload-s3: Upload encrypted backup to any S3-compatible endpoint
- backup.download-s3: Download backup from S3 to local storage
Supports MinIO, Backblaze B2, Wasabi via basic auth + S3 API.
Backups are AES-256-GCM encrypted before upload.
Rate-limited at 3 requests per 10 minutes.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>