Function enable_providers_v2

crates/openshell-server/src/grpc/policy.rs:4414–4427

(state: &Arc<ServerState>)

    }

    async fn enable_providers_v2(state: &Arc<ServerState>) {
        let global_settings = StoredSettings {
            revision: 1,
            settings: std::iter::once((
                settings::PROVIDERS_V2_ENABLED_KEY.to_string(),
                StoredSettingValue::Bool(true),
            ))
            .collect(),
            ..Default::default()
        };
        save_global_settings(state.store.as_ref(), &global_settings)
            .await
            .unwrap();
    }

    async fn get_sandbox_policy(state: &Arc<ServerState>, sandbox_id: &str) -> ProtoSandboxPolicy {
        handle_get_sandbox_config(