Get relationship scores

Read the live relationship score meter for one app-owned session. This is an explicit alias for the opt-in ``relational_meter`` on ``GET /v1/sessions/{id}/state``. By default it returns a redacted empty meter. After ``PATCH /v1/apps/{app_id} {"expose_relational_numerics": true}``, it returns final per-dimension 0..1 values such as ``affection_toward_user`` and ``romantic_interest`` for dating schemas. Raw extractor deltas, patch history, signal events, critic reasoning, and prompt text are never exposed. Typical opt-in response: ```json { "relationship_scores": [ { "key": "affection_toward_user", "label": "affection", "value": 0.62, "lower_is_open": false }, { "key": "romantic_interest", "label": "romantic interest", "value": 0.41, "lower_is_open": false } ] } ```