[Enhance][Bug fix] Add log db & log bug

- Add a log database to record all playing scores
- Fix a bug that if an exception is raised before flask app runs, logger will not work well.

latest version/core/operation.py

@@ -23,6 +23,7 @@ class RefreshAllScoreRating(BaseOperation):
 
     def run(self):
         # 追求效率，不用Song类，尽量不用对象
+        # 但其实还是很慢
         with Connect() as c:
             c.execute(
                 '''select song_id, rating_pst, rating_prs, rating_ftr, rating_byn from chart''')