add support for content_addressed metadata type

[Slach]

2026-07-21 05:21:57.881 ERR pkg/server/server.go:468 > API /backup/actions error: createBackup failed: one of createBackupLocal go-routine return error: b.AddTableToLocalBackup: b.uploadObjectDiskParts: object_disk.InitCredentialsAndConne
ctions: InitCredentialsAndConnections getObjectDisksCredentials: //storage_configuration/disks/cas, unsupported <metadata_type>content_addressed</metadata_type>