fix(stock): 매매알람 이력 days 필터 포맷을 ISO로 통일 (경계일 과다포함 수정, 리뷰 Important)

stock/app/db.py

@@ -509,7 +509,7 @@ def add_alert_history(ticker: str, name: str, kind: str, condition: str, price,
 def get_alert_history(days: int = 7) -> list:
     with _conn() as conn:
         rows = conn.execute(
-            "SELECT * FROM trade_alert_history WHERE fired_at >= datetime('now', ?) ORDER BY fired_at DESC",
+            "SELECT * FROM trade_alert_history WHERE fired_at >= strftime('%Y-%m-%dT%H:%M:%fZ','now', ?) ORDER BY fired_at DESC",
             (f"-{int(days)} days",),
         ).fetchall()
     return [