Fix NFO batch endpoint route priority and test fixture

tests/unit/test_database_init.py

@@ -473,11 +473,12 @@ async def test_validate_schema_with_inspection_error():
 def test_schema_constants():
     """Test that schema constants are properly defined."""
     assert CURRENT_SCHEMA_VERSION == "1.0.0"
-    assert len(EXPECTED_TABLES) == 4
+    assert len(EXPECTED_TABLES) == 5
     assert "anime_series" in EXPECTED_TABLES
     assert "episodes" in EXPECTED_TABLES
     assert "download_queue" in EXPECTED_TABLES
     assert "user_sessions" in EXPECTED_TABLES
+    assert "system_settings" in EXPECTED_TABLES
 
 
 if __name__ == "__main__":