refactor(assets): modular architecture + async two-phase scanner & background seeder (#12621)

tests-unit/assets_test/queries/conftest.py

@@ -0,0 +1,20 @@
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session
+
+from app.assets.database.models import Base
+
+
+@pytest.fixture
+def session():
+    """In-memory SQLite session for fast unit tests."""
+    engine = create_engine("sqlite:///:memory:")
+    Base.metadata.create_all(engine)
+    with Session(engine) as sess:
+        yield sess
+
+
+@pytest.fixture(autouse=True)
+def autoclean_unit_test_assets():
+    """Override parent autouse fixture - query tests don't need server cleanup."""
+    yield