Updates the company-level AI settings, and syncs the change to the enterprise the same way the admin portal does. Settings that are omitted are left unchanged, and a setting cannot be cleared, so an explicit null is rejected with a 400, as is a request that sets nothing. A company-level API key can call this without a user credential. Any other caller must be a company admin, the admin of a single-office company, or have write access to AI settings: a missing user credential gets a 401, and any other caller gets a 403.

Rate limit: 1200 per minute.