Fetch executives by industry directly from the API
Charity Commission trustees + Google search for club affiliations
Searches football club foundations (Arsenal Foundation, Man Utd Foundation, etc.) for trustees and donors. Anyone found = Confirmed fan.
Searches each exec's name + football terms. Detects club mentions in results and scores confidence. Uses ~83 searches/day (2,500/month via Serper) — runs through execs who don't have signals yet.