不使用本地库，使用mariadb完成存储

message_report/db_init.sql

@@ -1,9 +1,15 @@
-CREATE TABLE IF NOT EXISTS speech_counts
+
+USE message_archive;
+-- auto-generated definition
+create table speech_counts
 (
-    group_id TEXT,
+    id       int auto_increment
-    wx_id    TEXT,
+        primary key,
-    date     TEXT,
+    group_id text null,
-    count    INTEGER,
+    wx_id    text null,
-    PRIMARY KEY (group_id, wx_id, date)
+    date     text null,
-)
+    count    int  null,
+    constraint speech_counts_group_id_wx_id_date_uindex
+        unique (group_id, wx_id, date) using hash
+);