fix: resolve lint failures blocking CI

- src/cartsnitch_api/auth/dependencies.py: remove unused Cookie import
- src/cartsnitch_api/auth/routes.py: remove unused BaseModel, select, and User imports
- src/cartsnitch_api/main.py: fix import ordering

These were pre-existing issues unrelated to CAR-932 fix, blocking CI.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/cartsnitch_api/auth/dependencies.py

@@ -5,7 +5,8 @@ Sessions are verified by querying the shared sessions table directly.
 """
 
 from datetime import UTC, datetime
-from fastapi import Cookie, Depends, Header, HTTPException, Request, status
+
+from fastapi import Depends, Header, HTTPException, Request, status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
 from sqlalchemy import text
 from sqlalchemy.ext.asyncio import AsyncSession

src/cartsnitch_api/auth/routes.py

@@ -6,13 +6,10 @@ endpoints that query our own user data from the shared database.
 """
 
 from fastapi import APIRouter, Depends, HTTPException, status
-from pydantic import BaseModel
-from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from cartsnitch_api.auth.dependencies import get_current_user
 from cartsnitch_api.database import get_db
-from cartsnitch_api.models import User
 from cartsnitch_api.schemas import (
     UpdateUserRequest,
     UserResponse,

src/cartsnitch_api/main.py

@@ -6,10 +6,11 @@ from fastapi import APIRouter, FastAPI
 
 from cartsnitch_api.auth.routes import router as auth_router
 from cartsnitch_api.cache import cache_client
+from cartsnitch_api.database import dispose_engine
+from cartsnitch_api.middleware.audit import add_audit_middleware
 from cartsnitch_api.middleware.cors import add_cors_middleware
 from cartsnitch_api.middleware.error_handler import add_error_handlers, add_error_monitor_middleware
 from cartsnitch_api.middleware.rate_limit import add_rate_limit_middleware
-from cartsnitch_api.middleware.audit import add_audit_middleware
 from cartsnitch_api.routes.alerts import router as alerts_router
 from cartsnitch_api.routes.coupons import router as coupons_router
 from cartsnitch_api.routes.health import router as health_router
@@ -25,7 +26,6 @@ from cartsnitch_api.routes.user import router as user_router
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
-    from cartsnitch_api.database import dispose_engine
     await cache_client.initialize()
     yield
     await cache_client.close()