feat: JWT auth, user management, audit logging system

Co-Authored-By: Claude <noreply@anthropic.com>

backend/tests/conftest.py

@@ -0,0 +1,53 @@
+"""Test fixtures: async client + in-memory SQLite database."""
+import asyncio
+from typing import AsyncGenerator
+
+import pytest
+import pytest_asyncio
+from httpx import ASGITransport, AsyncClient
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+
+from app.database import Base, get_db
+from app.main import app
+
+TEST_DATABASE_URL = "sqlite+aiosqlite:///:memory:"
+
+
+@pytest.fixture(scope="session")
+def event_loop():
+    loop = asyncio.new_event_loop()
+    yield loop
+    loop.close()
+
+
+@pytest_asyncio.fixture(scope="session")
+async def engine():
+    engine = create_async_engine(TEST_DATABASE_URL, echo=False)
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+    yield engine
+    await engine.dispose()
+
+
+@pytest_asyncio.fixture
+async def db(engine) -> AsyncGenerator[AsyncSession, None]:
+    session_factory = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+    async with session_factory() as session:
+        yield session
+
+
+@pytest_asyncio.fixture
+async def client(engine) -> AsyncGenerator[AsyncClient, None]:
+    session_factory = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+    async def override_get_db():
+        async with session_factory() as session:
+            yield session
+
+    app.dependency_overrides[get_db] = override_get_db
+
+    transport = ASGITransport(app=app)
+    async with AsyncClient(transport=transport, base_url="http://test") as ac:
+        yield ac
+
+    app.dependency_overrides.clear()