refactor: reorganize import statements for consistency across multiple files

tests/services/test_task_service.py

@@ -8,10 +8,6 @@ from datetime import datetime, timedelta, timezone
 
 import pytest
 import pytest_asyncio
-from sqlalchemy import select
-from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
-from sqlalchemy.pool import StaticPool
-
 from app.models.activity import Activity, ActivityType
 from app.models.base import Base
 from app.models.contact import Contact
@@ -29,6 +25,9 @@ from app.services.task_service import (
     TaskService,
     TaskUpdateData,
 )
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.pool import StaticPool
 
 
 @pytest_asyncio.fixture()