feat(auth): sync Keycloak users for authorization

tests/unit/test_metadata_repository_users.py

@@ -0,0 +1,44 @@
+from types import SimpleNamespace
+from unittest.mock import AsyncMock
+from uuid import uuid4
+
+import pytest
+
+from app.infra.db.metadb.repositories.metadata_repository import MetadataRepository
+
+
+@pytest.fixture
+def anyio_backend():
+    return "asyncio"
+
+
+@pytest.mark.anyio
+async def test_keycloak_snapshot_sync_preserves_existing_authorization():
+    keycloak_id = uuid4()
+    user = SimpleNamespace(
+        keycloak_id=keycloak_id,
+        username="old-name",
+        email="old@example.com",
+        role="admin",
+        is_active=True,
+        is_superuser=True,
+        updated_at=None,
+    )
+    session = SimpleNamespace(commit=AsyncMock(), refresh=AsyncMock())
+    repository = MetadataRepository(session)
+    repository.get_user_by_keycloak_id = AsyncMock(return_value=user)
+
+    result, created = await repository.sync_user_snapshot_from_keycloak(
+        keycloak_id=keycloak_id,
+        username="new-name",
+        email="new@example.com",
+    )
+
+    assert created is False
+    assert result.username == "new-name"
+    assert result.email == "new@example.com"
+    assert result.role == "admin"
+    assert result.is_active is True
+    assert result.is_superuser is True
+    session.commit.assert_awaited_once()
+    session.refresh.assert_awaited_once_with(user)