Fix: Make MongoDriver.connect() public to match Driver interface

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/drivers/mongo/src/index.ts

@@ -21,7 +21,7 @@ export class MongoDriver implements Driver {
         this.connected = this.connect();
     }
 
-    private async connect() {
+    async connect() {
         await this.client.connect();
         this.db = this.client.db(this.config.dbName);
     }