'slot' should be optional

Author: tieneupin

src/murfey/server/ispyb.py

@@ -153,7 +153,11 @@ def do_insert_atlas(self, record: Atlas):
         return {"success": False, "return_value": None}
 
     def do_update_atlas(
-        self, atlas_id: int, atlas_image: str, pixel_size: float, slot: int
+        self,
+        atlas_id: int,
+        atlas_image: str,
+        pixel_size: float,
+        slot: int | None,
     ):
         try:
             with ISPyBSession() as db: