Added seed database and updated tests

Author: rkritika1508

backend/app/tests/conftest.py

@@ -96,21 +96,6 @@ def seed_db():
         seed_test_data(session)
         yield
 
-@pytest.fixture
-def clear_database():
-    """Clear key config tables before and after each test."""
-    with Session(test_engine) as session:
-        session.exec(delete(BanList))
-        session.exec(delete(ValidatorConfig))
-        session.commit()
-
-    yield
-
-    with Session(test_engine) as session:
-        session.exec(delete(BanList))
-        session.exec(delete(ValidatorConfig))
-        session.commit()
-
 @pytest.fixture(scope="function")
 def client():
     with TestClient(app) as c: