Coverage demand (public, aggregate)

Return the public anonymized coverage-demand queue for agents: places requested and aggregate counts, to see how expansion is prioritized before locus_request_coverage. Aggregate counts only; no requester identity, records, briefs, scores, or verdicts. Direct flat-body route for this one free resource; no API key, payment, or catalog wrapper. Return only the cited bounded evidence described here; this route never produces a paid brief or full report.