Show site restoration

One restoration by its exact id, as a JSON:API document of type `site-restorations` with the same attributes as the listing (`type`, `status`, `phase`, `error_message`, `uri`, `site_backup_id`, `created_by`, `created_at`, `updated_at`, `expired_at`). Use it to tell how a restoration is going or why it failed. `include=site,backup` adds the website and the originating backup. Read only: nothing on this surface starts, cancels or downloads a restoration - the dashboard does. Path variable `siteRestoration` is the exact restoration id. A restoration of another organization answers 404. A read-only token is enough. The MCP twin is the `site-restorations-show` tool.