perf: API 응답 최적화 + 점진적 렌더링 + 해구 choropleth 지도 #38
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변경 사항
백엔드 SQL 최적화 (5개 API)
haegu/realtime: DB 공간 JOIN(12s) → 인메모리 캐시 순회(~50ms)batch/statistics: N+1 JobExplorer(1.1s) → 단일 SQL 집계(~100ms)batch/daily-stats: N+1×7일(9s) → 직접 SQL 2쿼리(~200ms)throughput: pg_total_relation_size 반복(1.4s) → Caffeine 5분 캐시quality: 풀스캔(0.6s) → 24시간 범위 제한프론트엔드 성능
해구 choropleth 지도
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