chat

A conversation changed state. `status` is the new state and `previous_status` is what it was before. Each status means something different for your side, so branch on it rather than storing the string. `operator_attention` is the one to raise an alert on: it means a human is needed. `closed` carries two extra fields, `context_reset` and `message_count`. **`context_reset` is not a deletion flag** — nothing is deleted, the prior history simply stops being replayed to the AI as context. A partner who treated it as a deletion instruction would discard a transcript we still hold.