Account portfolio

Returns a position-first portfolio view for an owner on a single chain. The backend builds SDK Account and Portfolio entities from internal V3 account, vault, price, and label data sources; it does not recursively call /v3/accounts/{address}/positions. When forceFresh=true, the endpoint enqueues or promotes account snapshot refresh work and waits briefly for refreshed snapshots before falling back to the current indexed portfolio view. Freshness metadata indicates whether the refresh completed, timed out, or was rate-limited. When any EVK position has unknown debt or controller state, affected SDK rows are omitted and the aggregate portfolio.totals properties are omitted instead of reporting an incomplete result as zero.