feat: initial upbit auto-trader implementation

Strategy C: volatility breakout (Larry Williams K=0.5) AND momentum
(MA20 + 2x volume surge) must both trigger for a buy signal.

Hard rules:
- Trailing stop: sell when price drops -10% from peak
- Max budget: 1,000,000 KRW total, up to 3 positions (333,333 KRW each)
- Scan top 20 KRW tickers by 24h trading volume every 60s
- Monitor positions every 10s

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

main.py

@@ -0,0 +1,35 @@
+"""Upbit 자동 트레이딩 봇 진입점."""
+
+import logging
+import threading
+
+from dotenv import load_dotenv
+
+load_dotenv()
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+    handlers=[
+        logging.StreamHandler(),
+        logging.FileHandler("trading.log", encoding="utf-8"),
+    ],
+)
+
+from core.monitor import run_monitor
+from daemon.runner import run_scanner
+
+
+def main() -> None:
+    # 트레일링 스탑 감시 스레드 (10초 주기)
+    monitor_thread = threading.Thread(
+        target=run_monitor, args=(10,), daemon=True, name="monitor"
+    )
+    monitor_thread.start()
+
+    # 매수 스캔 루프 (60초 주기, 메인 스레드)
+    run_scanner()
+
+
+if __name__ == "__main__":
+    main()