now with a working countdowntimer for each dewar

backend/app/schemas.py

@@ -277,17 +277,16 @@ class LogisticsEventCreate(BaseModel):
     location_qr_code: str
     transaction_type: str
 
-class Slot(BaseModel):
+class SlotSchema(BaseModel):
     id: str
     qr_code: str
     label: str
     qr_base: Optional[str]
     occupied: bool
     needs_refill: bool
-    last_refill: datetime
-    time_until_refill: int  # Can't be Optional
-    dewar_unique_id: Optional[str]  # Ensure this field exists
-    dewar: Optional[Dewar] = None  # Add this field
+    dewar_unique_id: Optional[str]
+    dewar_name: Optional[str]
+    time_until_refill: Optional[int]  # Ensure this field is defined
 
     class Config:
         from_attributes = True