fix all pylint warnings, add tests (wip) fix recap

backend/src/contracts/contracts.py

@@ -4,11 +4,10 @@ import zipfile
 
 import src.contracts.service as service
 import src.forms.service as form_service
-import src.messages as messages
 from fastapi import APIRouter, Depends, HTTPException, Query
 from fastapi.responses import StreamingResponse
 from sqlmodel import Session
-from src import models
+from src import messages, models
 from src.auth.auth import get_current_user
 from src.contracts.generate_contract import (generate_html_contract,
                                              generate_recap)