Remove and reorder unused imports across the project for cleaner and more consistent code structure

backend/app/core/config.py

@@ -1,7 +1,8 @@
-from pydantic_settings import BaseSettings
-from typing import Optional, List
-from pydantic import Field, field_validator
 import logging
+from typing import Optional, List
+
+from pydantic import Field, field_validator
+from pydantic_settings import BaseSettings
 
 
 class Settings(BaseSettings):

backend/app/core/database.py

@@ -2,11 +2,12 @@
 import logging
 from contextlib import contextmanager
 from typing import Generator
+
 from sqlalchemy import create_engine, text
+from sqlalchemy.dialects.postgresql import JSONB, UUID
+from sqlalchemy.ext.compiler import compiles
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker, Session
-from sqlalchemy.ext.compiler import compiles
-from sqlalchemy.dialects.postgresql import JSONB, UUID
 
 from app.core.config import settings
 

backend/app/core/database_async.py

@@ -10,6 +10,7 @@ from contextlib import asynccontextmanager
 from typing import AsyncGenerator
 
 from sqlalchemy import text
+from sqlalchemy.dialects.postgresql import JSONB, UUID
 from sqlalchemy.ext.asyncio import (
     AsyncSession,
     AsyncEngine,
@@ -17,7 +18,6 @@ from sqlalchemy.ext.asyncio import (
     async_sessionmaker,
 )
 from sqlalchemy.ext.compiler import compiles
-from sqlalchemy.dialects.postgresql import JSONB, UUID
 from sqlalchemy.orm import DeclarativeBase
 
 from app.core.config import settings

backend/app/core/exceptions.py

@@ -2,10 +2,11 @@
 Custom exceptions and global exception handlers for the API.
 """
 import logging
-from typing import Optional, Union, List
+from typing import Optional, Union
+
 from fastapi import HTTPException, Request, status
-from fastapi.responses import JSONResponse
 from fastapi.exceptions import RequestValidationError
+from fastapi.responses import JSONResponse
 from pydantic import ValidationError
 
 from app.schemas.errors import ErrorCode, ErrorDetail, ErrorResponse