StandingShape - temper

A finding's evidential-standing shape (SQL resource_standing_shape). All fields are
non-nullable: the access gate is INSIDE the SQL (a gated CTE over resources_readable_by),
so an unreadable finding yields zero rows — never a partial/nullable row — and the caller-side
read returns Option<StandingShape>, None for "not readable."

{ "audit_coverage": 0, "band": "string", "citation_magnitude": 0, "citation_quality": 0, "contradiction_balance": 0, "finding_id": "feebf65a-2eaa-4fae-aab2-772450efdffe", "freshness": 0, "r_parent": 0 }