9:import logging
10:import random
11:import re as _re
12:import time
13:from datetime import datetime, timedelta, timezone
15:import googleapiclient.errors
16:import redis as redis_lib
17:from celery import Task
18:from sqlalchemy import select
20:from app.core.config import settings
21:from app.db.session import SyncSession
22:from app.models import (Attachment, Campaign, CampaignRecipient, EmailEvent,
25:from app.services import attachments_service, message_builder
26:from app.services.gmail_service import build_gmail_client_from_account
27:from app.services.variable_engine import GeneratedValues, VariableEngine
28:from app.worker.celery_app import celery_app
syntax OK