chore: partially drop Union typehint

dzgui/api/bm.py

@@ -1,12 +1,15 @@
 import logging
 import requests
-from typing import Optional
+from typing import Optional, TYPE_CHECKING
 
 from dzgui.const.constants import APP_NAME
 from dzgui.const.endpoints import BM_SERVERS
 
 logger = logging.getLogger(APP_NAME)
 
+if TYPE_CHECKING:
+    from dzgui.api.servers import Record
+
 
 def get_attributes(key: str, uid: int) -> str:
     # TODO: handle if key is not set