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_analytics_service.py

@@ -1,4 +1,5 @@
 """Unit tests for AnalyticsService."""
+
 from __future__ import annotations
 
 from collections.abc import AsyncGenerator
@@ -7,9 +8,6 @@ from decimal import Decimal
 
 import pytest
 import pytest_asyncio
-from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
-from sqlalchemy.pool import StaticPool
-
 from app.models import Base
 from app.models.contact import Contact
 from app.models.deal import Deal, DealStage, DealStatus
@@ -18,13 +16,17 @@ from app.models.organization_member import OrganizationMember, OrganizationRole
 from app.models.user import User
 from app.repositories.analytics_repo import AnalyticsRepository
 from app.services.analytics_service import AnalyticsService, invalidate_analytics_cache
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.pool import StaticPool
 from tests.utils.fake_redis import InMemoryRedis
 
 
 @pytest_asyncio.fixture()
 async def session() -> AsyncGenerator[AsyncSession, None]:
     engine = create_async_engine(
-        "sqlite+aiosqlite:///:memory:", future=True, poolclass=StaticPool
+        "sqlite+aiosqlite:///:memory:",
+        future=True,
+        poolclass=StaticPool,
     )
     async with engine.begin() as conn:
         await conn.run_sync(Base.metadata.create_all)
@@ -36,12 +38,18 @@ async def session() -> AsyncGenerator[AsyncSession, None]:
 
 async def _seed_data(session: AsyncSession) -> tuple[int, int, int]:
     org = Organization(name="Analytics Org")
-    user = User(email="analytics@example.com", hashed_password="hashed", name="Analyst", is_active=True)
+    user = User(
+        email="analytics@example.com", hashed_password="hashed", name="Analyst", is_active=True
+    )
     session.add_all([org, user])
     await session.flush()
 
-    member = OrganizationMember(organization_id=org.id, user_id=user.id, role=OrganizationRole.OWNER)
-    contact = Contact(organization_id=org.id, owner_id=user.id, name="Client", email="client@example.com")
+    member = OrganizationMember(
+        organization_id=org.id, user_id=user.id, role=OrganizationRole.OWNER
+    )
+    contact = Contact(
+        organization_id=org.id, owner_id=user.id, name="Client", email="client@example.com"
+    )
     session.add_all([member, contact])
     await session.flush()
 
@@ -231,4 +239,4 @@ async def test_funnel_reads_from_cache_when_available(session: AsyncSession) ->
     service._repository = _ExplodingRepository(session)
 
     cached = await service.get_deal_funnel(org_id)
-    assert len(cached) == 4
+    assert len(cached) == 4