Continues from migration 116 (trimmed to GIST index only after timeout).
Algorithm:
1. Materialize unmapped DOM.РФ ЕКБ objects → _u_domrf (~1056 rows)
2. Materialize unmapped Objective projects → _u_obj (~178 rows)
3. CROSS JOIN LATERAL with top-3 per obj_id, leveraging GIST trgm index from 116
4. Composite score = name_sim*0.6 + dev_match*0.25 + district_match*0.15
5. INSERT auto-accepted (composite >= 0.75) with ON CONFLICT DO NOTHING
Why pre-materialize: original CTE recomputed unmapped lists for every row,
costing 89M and timing out. Temp tables compute once + GIST index = <30s.
Expected: +50-80 mappings, total ~200. Coverage Site Finder competitors
улучшится с 15% до ~40-60% (особенно для районов с Объективными devs).
