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.

app/core/security.py

@@ -1,13 +1,14 @@
 """Security helpers for hashing passwords and issuing JWT tokens."""
+
 from __future__ import annotations
 
+from collections.abc import Mapping
 from datetime import datetime, timedelta, timezone
-from typing import Any, Mapping
+from typing import Any
 
 import jwt
-from passlib.context import CryptContext  # type: ignore
-
 from app.core.config import settings
+from passlib.context import CryptContext  # type: ignore
 
 
 class PasswordHasher: