fix sort order for contract recap

backend/src/contracts/contracts.py

@@ -268,8 +268,11 @@ def get_contract_recap(
     form = form_service.get_one(session, form_id=form_id)
     contracts = service.get_all(session, user, forms=[form.name])
     filename = f'{form.name}_recapitulatif_contrats.ods'
+    recap = generate_recap(contracts, form)
+    if recap is None:
+        raise HTTPException(status_code=404)
     return StreamingResponse(
-        io.BytesIO(generate_recap(contracts, form)),
+        io.BytesIO(recap),
         media_type='application/vnd.oasis.opendocument.spreadsheet',
         headers={
             'Content-Disposition': (