ocale: asset-permissions client

## Description

Tracking issue. Open Cloud exposes asset-permissions, letting an asset's *who-can-use-this* state be managed declaratively. Useful when an experience depends on private assets owned by a group or another user; declaring the permission grants in config keeps drift detectable.

## Endpoints

- `/asset-permissions-api/v1/assets/permissions`

Start by locating the existing Open Cloud client entry points and how they model other API resources. Focus on the `/asset-permissions-api/v1/assets/permissions` endpoint and determine the request and response shapes needed for declarative permissions. Done means the asset-permissions client is exposed consistently with the other clients and its behavior is covered by the repository's existing checks.

Written by the indexing model from the issue text.