refactor(kis): 한국투자증권(KIS) 데이터 수집 엔진 효율화 및 DB 인프라 최적화

src/quant_engine/kis_data_collection_v1.py

@@ -1,9 +1,9 @@
 """KIS-first data collector for the CI scheduler.
 
-The collector uses the existing `GatherTradingData.json` snapshot as the seed
-universe, then enriches Korean tickers with read-only KIS quotations and
-orderbook data, while retaining Naver/Yahoo fallbacks when available.
-The canonical persistence target is SQLite.
+The collector treats SQLite as the canonical persistence layer.
+`GatherTradingData.json` is emitted only after the DB-backed collection run
+finishes, so the JSON acts as a derived reporting artifact rather than the
+source of truth.
 """
 from __future__ import annotations