cl-lookup-sync

Sync the Champions League workbook's Lookup sheet into Supabase public.football_lookup, safely and with a reviewable diff. Use this whenever Ashwin says any of: 'sync the Lookup sheet', 'sync ChampionsLeague.xlsx to Supabase', 'the Lookup sheet changed', 'I added a club to Lookup', 'update the football mappings', 'the metro mapping for a club is wrong', or when an UNMATCHED alert from the daily football-standings…