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_organization_service.py

@@ -1,12 +1,11 @@
 """Unit tests for OrganizationService."""
+
 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.models.organization import Organization
 from app.models.organization_member import OrganizationMember, OrganizationRole
 from app.repositories.org_repo import OrganizationRepository
@@ -18,6 +17,7 @@ from app.services.organization_service import (
     OrganizationMemberAlreadyExistsError,
     OrganizationService,
 )
+from sqlalchemy.ext.asyncio import AsyncSession
 
 
 class StubOrganizationRepository(OrganizationRepository):
@@ -27,7 +27,9 @@ class StubOrganizationRepository(OrganizationRepository):
         super().__init__(session=MagicMock(spec=AsyncSession))
         self._membership = membership
 
-    async def get_membership(self, organization_id: int, user_id: int) -> OrganizationMember | None:  # pragma: no cover - helper
+    async def get_membership(
+        self, organization_id: int, user_id: int
+    ) -> OrganizationMember | None:  # pragma: no cover - helper
         if (
             self._membership
             and self._membership.organization_id == organization_id
@@ -37,7 +39,9 @@ class StubOrganizationRepository(OrganizationRepository):
         return None
 
 
-def make_membership(role: OrganizationRole, *, organization_id: int = 1, user_id: int = 10) -> OrganizationMember:
+def make_membership(
+    role: OrganizationRole, *, organization_id: int = 1, user_id: int = 10
+) -> OrganizationMember:
     organization = Organization(name="Acme Inc")
     organization.id = organization_id
     membership = OrganizationMember(
@@ -70,7 +74,9 @@ class SessionStub:
 class MembershipRepositoryStub(OrganizationRepository):
     """Repository stub that can emulate duplicate checks for add_member."""
 
-    def __init__(self, memberships: dict[tuple[int, int], OrganizationMember] | None = None) -> None:
+    def __init__(
+        self, memberships: dict[tuple[int, int], OrganizationMember] | None = None
+    ) -> None:
         self._session_stub = SessionStub()
         super().__init__(session=cast(AsyncSession, self._session_stub))
         self._memberships = memberships or {}
@@ -88,7 +94,9 @@ async def test_get_context_success() -> None:
     membership = make_membership(OrganizationRole.MANAGER)
     service = OrganizationService(StubOrganizationRepository(membership))
 
-    context = await service.get_context(user_id=membership.user_id, organization_id=membership.organization_id)
+    context = await service.get_context(
+        user_id=membership.user_id, organization_id=membership.organization_id
+    )
 
     assert context.organization_id == membership.organization_id
     assert context.role == OrganizationRole.MANAGER
@@ -174,7 +182,9 @@ async def test_add_member_rejects_duplicate_membership() -> None:
     service = OrganizationService(repo)
 
     with pytest.raises(OrganizationMemberAlreadyExistsError):
-        await service.add_member(context=context, user_id=duplicate_user_id, role=OrganizationRole.MANAGER)
+        await service.add_member(
+            context=context, user_id=duplicate_user_id, role=OrganizationRole.MANAGER
+        )
 
 
 @pytest.mark.asyncio
@@ -191,4 +201,4 @@ async def test_add_member_requires_privileged_role() -> None:
         await service.add_member(context=context, user_id=99, role=OrganizationRole.MANAGER)
 
     # Ensure DB work not attempted when permissions fail.
-    assert repo.session_stub.committed is False
+    assert repo.session_stub.committed is False