Refactor code for improved readability and consistency

- Reformatted function signatures in `organization_service.py` and `task_service.py` for better alignment.
- Updated import statements across multiple files for consistency and organization.
- Enhanced test files by improving formatting and ensuring consistent use of async session factories.
- Added type hints and improved type safety in various service and test files.
- Adjusted `pyproject.toml` to include configuration for isort, mypy, and ruff for better code quality checks.
- Cleaned up unused imports and organized existing ones in several test files.

tests/services/test_auth_service.py

@@ -1,16 +1,16 @@
 """Unit tests for AuthService."""
+
 from __future__ import annotations
 
 from typing import cast
 from unittest.mock import MagicMock
 
 import pytest  # type: ignore[import-not-found]
-from sqlalchemy.ext.asyncio import AsyncSession
-
 from app.core.security import JWTService, PasswordHasher
 from app.models.user import User
 from app.repositories.user_repo import UserRepository
 from app.services.auth_service import AuthService, InvalidCredentialsError, InvalidRefreshTokenError
+from sqlalchemy.ext.asyncio import AsyncSession
 
 
 class StubUserRepository(UserRepository):
@@ -49,7 +49,9 @@ def jwt_service() -> JWTService:
 
 
 @pytest.mark.asyncio
-async def test_authenticate_success(password_hasher: PasswordHasher, jwt_service: JWTService) -> None:
+async def test_authenticate_success(
+    password_hasher: PasswordHasher, jwt_service: JWTService
+) -> None:
     hashed = password_hasher.hash("StrongPass123")
     user = User(email="user@example.com", hashed_password=hashed, name="Alice", is_active=True)
     user.id = 1
@@ -100,7 +102,9 @@ async def test_refresh_tokens_returns_new_pair(
     password_hasher: PasswordHasher,
     jwt_service: JWTService,
 ) -> None:
-    user = User(email="refresh@example.com", hashed_password="hashed", name="Refresh", is_active=True)
+    user = User(
+        email="refresh@example.com", hashed_password="hashed", name="Refresh", is_active=True
+    )
     user.id = 7
     service = AuthService(StubUserRepository(user), password_hasher, jwt_service)
 
@@ -116,7 +120,9 @@ async def test_refresh_tokens_rejects_access_token(
     password_hasher: PasswordHasher,
     jwt_service: JWTService,
 ) -> None:
-    user = User(email="refresh@example.com", hashed_password="hashed", name="Refresh", is_active=True)
+    user = User(
+        email="refresh@example.com", hashed_password="hashed", name="Refresh", is_active=True
+    )
     user.id = 9
     service = AuthService(StubUserRepository(user), password_hasher, jwt_service)