Add pyproject.toml for consolidated project configuration and replace Black, isort, and Flake8 with Ruff

- Introduced `pyproject.toml` to centralize backend tool configurations (e.g., Ruff, mypy, coverage, pytest).
- Replaced Black, isort, and Flake8 with Ruff for linting, formatting, and import sorting.
- Updated `requirements.txt` to include Ruff and remove replaced tools.
- Added `Makefile` to streamline development workflows with commands for linting, formatting, type-checking, testing, and cleanup.

backend/app/utils/test_utils.py

@@ -9,17 +9,19 @@ from app.core.database import Base
 
 logger = logging.getLogger(__name__)
 
+
 def get_test_engine():
     """Create an SQLite in-memory engine specifically for testing"""
     test_engine = create_engine(
         "sqlite:///:memory:",
         connect_args={"check_same_thread": False},
         poolclass=StaticPool,  # Use static pool for in-memory testing
-        echo=False
+        echo=False,
     )
 
     return test_engine
 
+
 def setup_test_db():
     """Create a test database and session factory"""
     # Create a new engine for this test run
@@ -30,14 +32,12 @@ def setup_test_db():
 
     # Create session factory
     TestingSessionLocal = sessionmaker(
-        autocommit=False,
-        autoflush=False,
-        bind=test_engine,
-        expire_on_commit=False
+        autocommit=False, autoflush=False, bind=test_engine, expire_on_commit=False
     )
 
     return test_engine, TestingSessionLocal
 
+
 def teardown_test_db(engine):
     """Clean up after tests"""
     # Drop all tables
@@ -46,13 +46,14 @@ def teardown_test_db(engine):
     # Dispose of engine
     engine.dispose()
 
+
 async def get_async_test_engine():
     """Create an async SQLite in-memory engine specifically for testing"""
     test_engine = create_async_engine(
         "sqlite+aiosqlite:///:memory:",
         connect_args={"check_same_thread": False},
         poolclass=StaticPool,  # Use static pool for in-memory testing
-        echo=False
+        echo=False,
     )
     return test_engine
 
@@ -69,7 +70,7 @@ async def setup_async_test_db():
         autoflush=False,
         bind=test_engine,
         expire_on_commit=False,
-        class_=AsyncSession
+        class_=AsyncSession,
     )
 
     return test_engine, AsyncTestingSessionLocal