Qwen 说让我再改点东西所以改了，强化了数据库相关的事情

bot.py

@@ -10,6 +10,7 @@ from nonebot.adapters.onebot.v11 import Adapter as OnebotAdapter
 from konabot.common.log import init_logger
 from konabot.common.nb.exc import BotExceptionMessage
 from konabot.common.path import LOG_PATH
+from konabot.common.database import get_global_db_manager
 
 
 dotenv.load_dotenv()
@@ -49,6 +50,13 @@ def main():
     nonebot.load_plugins("konabot/plugins")
     nonebot.load_plugin("nonebot_plugin_analysis_bilibili")
 
+    # 注册关闭钩子
+    @driver.on_shutdown
+    async def shutdown_handler():
+        # 关闭全局数据库管理器
+        db_manager = get_global_db_manager()
+        await db_manager.close_all_connections()
+
     nonebot.run()
 
 if __name__ == "__main__":