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/api/v1/task_activity_shared.py

@@ -1,17 +1,17 @@
 """Shared helpers for task and activity API tests."""
+
 from __future__ import annotations
 
 from dataclasses import dataclass
 from datetime import timedelta
 
-from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
-
 from app.core.security import jwt_service
 from app.models.contact import Contact
 from app.models.deal import Deal
 from app.models.organization import Organization
 from app.models.organization_member import OrganizationMember, OrganizationRole
 from app.models.user import User
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
 
 
 @dataclass(slots=True)
@@ -27,7 +27,9 @@ class Scenario:
 
 async def prepare_scenario(session_factory: async_sessionmaker[AsyncSession]) -> Scenario:
     async with session_factory() as session:
-        user = User(email="owner@example.com", hashed_password="hashed", name="Owner", is_active=True)
+        user = User(
+            email="owner@example.com", hashed_password="hashed", name="Owner", is_active=True
+        )
         org = Organization(name="Acme LLC")
         session.add_all([user, org])
         await session.flush()