Returns the singleton PolicySettings for the given account.

Each boolean is required when ModelPermissions is sent. Using optional gives the field presence tracking, and (buf.validate.field).required makes server-side validation reject messages with any unset boolean. This forces callers (frontend, firectl, scripts) to always send all four permissions explicitly, instead of silently relying on bool's default of false. It also causes proto3 JSON to emit explicit false values on output, so a Get response always shows the full picture.

Per-model override rows. A model not listed here uses default_permissions.

Zero Data Retention (ZDR) blocks new work that would retain customer inputs or outputs, such as stored responses, batch jobs, uploads, and training. Compatible stateless requests continue. Enabling ZDR does not delete existing data. Caches, non-content metadata, and third-party retention are excluded.

Each scope uses its own enforcement when set, otherwise default_enforced.