fix: LocationRef import error in equipment_group.py – Backend startet jetzt

backend/app/schemas/equipment_group.py

@@ -1,8 +1,13 @@
 """Pydantic schemas for EquipmentGroup (Bundles)."""
 
+from __future__ import annotations
 from datetime import datetime
+from typing import TYPE_CHECKING
 from pydantic import BaseModel, Field
 
+if TYPE_CHECKING:
+    from app.schemas.equipment import LocationRef
+
 
 class EquipmentGroupItem(BaseModel):
     """An item inside a bundle with quantity."""