Backlink profile summary

Description

Returns a domain or page's backlink profile at a glance: total backlinks, referring domains, domain rank, spam score, broken links, and anchor/TLD distributions (flat object at result[0], no items array). The `rank` here is the target domain's own backlink-authority rank — a different metric from the per-referring-domain `rank` in backlink_gap/referring_domains rows, so the same domain can carry different numbers in each. Use it to qualify a site's authority in one cheap call before deeper link analysis.