async save(postLink) {
        await this.#LinkRedirect.edit({
            post_id: postLink.post_id.toHexString()
        }, {
            id: postLink.link_id.toHexString(),
            importing: true // skip setting updated_at when linking a post to a link
        });
    }
@param {PostLink} postLink
@returns {Promise<void>}