feat: quantcommon 가격 조회 추가

quantcommon.py

@@ -53,4 +53,18 @@ class QuantCommon:
         finally:
             engine.dispose()
 
-        return value_list
+        return value_list
+
+    def get_price_list(self):
+        engine = self.create_engine()
+
+        try:
+            price_list = pd.read_sql("""
+            select 날짜, 종가, 종목코드
+            from kor_price
+            where 날짜 >= (select (select max(날짜) from kor_price) - interval 1 year);
+            """, con=engine)
+        finally:
+            engine.dispose()
+
+        return price_list