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/api/v1/contacts.py

@@ -1,4 +1,5 @@
 """Contact API endpoints."""
+
 from __future__ import annotations
 
 from fastapi import APIRouter, Depends, HTTPException, Query, status
@@ -81,7 +82,9 @@ async def create_contact(
     context: OrganizationContext = Depends(get_organization_context),
     service: ContactService = Depends(get_contact_service),
 ) -> ContactRead:
-    data = payload.to_domain(organization_id=context.organization_id, fallback_owner=context.user_id)
+    data = payload.to_domain(
+        organization_id=context.organization_id, fallback_owner=context.user_id
+    )
     try:
         contact = await service.create_contact(data, context=context)
     except ContactForbiddenError as exc: