Required CSV columns (in any order): name, phone
Optional columns: heat (hot/warm/cold) · location (eastpointe, warren, southfield, detroit-east, detroit-north) · insurance (aetna, humana, wellcare, priority, bcbs, mab, other) · medicaid (yes/no) · stage (interested, appt-set, appt-kept, enrolled, nurture) · callback (date/time) · resources (food|transport|social|job — use | to separate multiple) · notes