Enroll leads in enrichment so they stay current: each lead is enriched now and re-checked about once a month for as long as the user keeps it, with change signals when something moves. Costs one lead per two businesses, paid once. Businesses a search found are already enrolled for free; already-enrolled leads and leads without a website are skipped at no cost. Use it for the imported or chosen leads the user cares about most. Runs in the background and returns a job id: poll get_job_status with kind "enrich".