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/test_tasks.py

@@ -1,20 +1,25 @@
 """API tests for task endpoints."""
+
 from __future__ import annotations
 
 from datetime import date, datetime, timedelta, timezone
 
 import pytest
+from app.models.task import Task
 from httpx import AsyncClient
 from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
-
-from app.models.task import Task
-
-from tests.api.v1.task_activity_shared import auth_headers, create_deal, make_token, prepare_scenario
+from tests.api.v1.task_activity_shared import (
+    auth_headers,
+    create_deal,
+    make_token,
+    prepare_scenario,
+)
 
 
 @pytest.mark.asyncio
 async def test_create_task_endpoint_creates_task_and_activity(
-    session_factory: async_sessionmaker[AsyncSession], client: AsyncClient
+    session_factory: async_sessionmaker[AsyncSession],
+    client: AsyncClient,
 ) -> None:
     scenario = await prepare_scenario(session_factory)
     token = make_token(scenario.user_id, scenario.user_email)
@@ -40,7 +45,8 @@ async def test_create_task_endpoint_creates_task_and_activity(
 
 @pytest.mark.asyncio
 async def test_list_tasks_endpoint_filters_by_deal(
-    session_factory: async_sessionmaker[AsyncSession], client: AsyncClient
+    session_factory: async_sessionmaker[AsyncSession],
+    client: AsyncClient,
 ) -> None:
     scenario = await prepare_scenario(session_factory)
     token = make_token(scenario.user_id, scenario.user_email)
@@ -63,7 +69,7 @@ async def test_list_tasks_endpoint_filters_by_deal(
                     due_date=datetime.now(timezone.utc) + timedelta(days=3),
                     is_done=False,
                 ),
-            ]
+            ],
         )
         await session.commit()