feat(room): use participated user count as participant count for playlist room

app/database/playlist_attempts.py

@@ -59,9 +59,10 @@ class ItemAttemptsCount(AsyncAttrs, ItemAttemptsCountBase, table=True):
         self.attempts = sum(score.attempts for score in playlist_scores)
         self.total_score = sum(score.total_score for score in playlist_scores)
         self.pp = sum(score.score.pp for score in playlist_scores)
-        self.completed = len([score for score in playlist_scores if score.score.passed])
+        passed_scores = [score for score in playlist_scores if score.score.passed]
+        self.completed = len(passed_scores)
         self.accuracy = (
-            sum(score.score.accuracy for score in playlist_scores) / self.completed if self.completed > 0 else 0.0
+            sum(score.score.accuracy for score in passed_scores) / self.completed if self.completed > 0 else 0.0
         )
         await session.commit()
         await session.refresh(self)