Patch _user_db_path tests to monkeypatch CLOUD_DATA_ROOT onto a
tmp_path so they never touch /devl or any real filesystem path.
Remove duplicate X-Real-IP comment block in cloud_session.get_session.
Add household_id and is_household_owner fields to CloudUser dataclass.
Update _user_db_path to route household members to a shared DB path.
Update _fetch_cloud_tier to return a 3-tuple and cache a dict.
Update get_session to unpack and propagate household fields.
