不使用本地库，使用mariadb完成存储

message_report/write_db.py

@@ -55,7 +55,7 @@ def generate_and_send_ranking(groupId, allContacts: dict):
     query = """
       SELECT wx_id,  count AS speech_count
         FROM speech_counts
-        WHERE DATE(date) = DATE('now', '-1 day')
+        WHERE DDATE_FORMAT(DATE_SUB('2025-01-01', INTERVAL 1 DAY), '%Y-%m-%d')
         AND group_id = %s
         GROUP BY wx_id
         ORDER BY count DESC