Enriches churches with lat/lng=0 using Nominatim search API.
Cleans trailing city/country suffixes from addresses before querying.
Maps HK/MO to 'cn' countrycodes (OSM treats them as part of China).
After this runs, enrich-with-reverse-geocode fills city/state fields.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
