Wave 3 pipeline for processing 253K+ place types with NO wiki/wikidata
tags (US+CA only). Uses Gemini to resolve Wikipedia titles.
Key feature: resolve_wikipedia_titles() now uses ThreadPoolExecutor
with 5 parallel workers, improving throughput from ~14/min to ~75/min.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>