Resolve "[Hotfix]: Overriding occupancy does not return string but Occupancy object"

Closes #7 (closed)

\approve @ds @tara

building/02_process/occupancy/occupancy.py

@@ -49,7 +49,7 @@ class OccupancyRule:
         # If any of the `overriding_occupancies` is in the list, return that one.
         for occ in occupancies:
             if occ in self.overriding_occupancies:
-                return {"occupancy": occ}
+                return {"occupancy": occ.occupancy_string}
 
         # Rule two tags; same level 1
         # If there is one unique level 0 and one unique level 1 (which implies that the