feat: replace volatility breakout with DB-backed real-time trend check

- price_history table on Oracle ADB stores prices every 10 minutes
- check_trend(): current price vs N hours ago (default 1h, +3% threshold)
- check_momentum(): unchanged (MA20 + 2x volume still applies)
- Ticker list cached 5 minutes to avoid 429 rate limits
- Collector starts 30s after boot to avoid simultaneous API calls
- Configurable: TREND_HOURS, TREND_MIN_GAIN_PCT in .env

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

core/price_collector.py

@@ -0,0 +1,52 @@
+"""10분마다 상위 종목 현재가를 Oracle DB에 저장하는 수집기."""
+
+from __future__ import annotations
+
+import logging
+import time
+
+import requests
+
+from .market import get_top_tickers
+from .price_db import cleanup_old_prices, insert_prices
+
+logger = logging.getLogger(__name__)
+
+COLLECT_INTERVAL = 600   # 10분 (초)
+CLEANUP_EVERY = 6        # 1시간(10분 × 6)마다 오래된 데이터 정리
+
+
+def run_collector(interval: int = COLLECT_INTERVAL) -> None:
+    """가격 수집 루프."""
+    logger.info(f"가격 수집기 시작 (주기={interval//60}분)")
+    time.sleep(30)  # 스캐너와 동시 API 호출 방지
+    cycle = 0
+    while True:
+        try:
+            tickers = get_top_tickers()
+            if not tickers:
+                continue
+            resp = requests.get(
+                "https://api.upbit.com/v1/ticker",
+                params={"markets": ",".join(tickers)},
+                timeout=5,
+            )
+            resp.raise_for_status()
+            data = resp.json()
+            valid = {
+                item["market"]: item["trade_price"]
+                for item in data
+                if item.get("trade_price")
+            }
+            insert_prices(valid)
+            logger.info(f"[수집] {len(valid)}개 종목 가격 저장")
+
+            cycle += 1
+            if cycle % CLEANUP_EVERY == 0:
+                cleanup_old_prices(keep_hours=48)
+                logger.info("오래된 가격 데이터 정리 완료")
+
+        except Exception as e:
+            logger.error(f"가격 수집 오류: {e}")
+
+        time.sleep(interval)