patching EPC api bug

backend/engine/engine.py

@@ -656,6 +656,15 @@ async def model_engine(body: PlanTriggerRequest):
                 # address_metadata=addr  Switched off to remove injecting landlord inputs
             )
 
+            # Warning! The EPC API is broken and we are getting missing data for local authority and
+            # constituency. We're going to add some verbose handling here but there may be problems
+            if prepared_epc.local_authority is None:
+                # Fill
+                prepared_epc.local_authority = ""
+
+            if prepared_epc.constituency is None:
+                prepared_epc.constituency = ""
+
             input_properties.append(
                 Property(
                     id=property_id,