Office market source discovery and measurement limits

For one county FIPS, list public employment and commercial office-report source leads with geography, methods, reuse cautions and explicit not-checked items. Does not fetch or fabricate office vacancy, occupancy, remote-work or a comparable time series. National discovery-only, read-only. 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.