5ecc35f9bb
Slice 1 fell over on eight DB fakes with frozen get_messages_as_conversation signatures — the new opt-in kwarg is part of the method's contract now, so the fakes accept **_kwargs like the real SessionDB. Also opts the child-watch resume projection into row ids: it feeds the same _history_to_messages as the desktop resume, so reactions on a watched child session address rows the same way.