chore: ajoute ruff (lint) et corrige les violations

- Config ruff dans pyproject.toml : règles E/W/F/I/UP/B, whitelist des appels
  d'injection FastAPI (Depends/File/Form/Query) pour B008, B904 ignoré
  (traduction volontaire des exceptions en réponses HTTP)
- Auto-fixes : tri des imports, suppression d'imports inutilisés, annotations
  PEP 604, f-strings sans placeholder, modes open redondants
- Suppression de variables inutilisées (config.reset_setting, parser locataires)

ruff check . : All checks passed ; 61 tests OK

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/plesna_gerance/api/routes/documents.py

@@ -4,17 +4,17 @@ import json
 import logging
 from datetime import datetime
 
-from fastapi import APIRouter, Depends, HTTPException, File, UploadFile, Form
-from fastapi.responses import Response, JSONResponse
-from sqlalchemy.orm import Session
+from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile
+from fastapi.responses import JSONResponse, Response
 from sqlalchemy import func, select
+from sqlalchemy.orm import Session
 
-from ...database import get_session, DatabaseService, storage
-from ...database.models import Document, Immeuble, Lot, Locataire, Revenu, Depense
+from ...database import DatabaseService, get_session, storage
+from ...database.models import Depense, Document, Immeuble, Locataire, Lot, Revenu
 from ...database.service import DuplicateDocumentError
 from ...extractor import extract_compte_rendu
-from ...utils.uploads import read_upload_limited, UploadTooLargeError
-from ..schemas import SaveRequest, SaveResponse, DocumentSummary
+from ...utils.uploads import UploadTooLargeError, read_upload_limited
+from ..schemas import DocumentSummary, SaveRequest, SaveResponse
 
 router = APIRouter(prefix="/api", tags=["documents"])