fix DatabaseService

src/modules/db.ts

@@ -13,7 +13,7 @@ import {
   PutUser,
   UseCommand,
 } from 'koishi-thirdeye';
-import { Channel, Database, Logger, Model, User } from 'koishi';
+import { Channel, Database, DatabaseService, Logger, Model, User } from 'koishi';
 import { RcRuleList } from '../utility/rc-rules';
 import {
   DiceModule,
@@ -43,7 +43,7 @@ export class DbModule extends BaseModule implements OnApply {
   private database: Database;
 
   @Inject(true)
-  private model: Model;
+  private model: DatabaseService;
 
   @InjectLogger('dicex-db')
   private logger: Logger;