Hide runtime values during planning!
User wrote this planning code:

```ts
holidayparkOperatorPackagesById(_query, args: OperatorPackageByIdFieldArgs) {
                    const { $ID } = args;

                    const relayId = Buffer.from($ID.value, 'base64').toString('utf8');
                    const parts = JSON.parse(relayId);
                    const parkOperatorId = parts[1];

                    console.log(parkOperatorId);

                    const $holidaypark_operator_packages = holidaypark_operator_package.find({
                        park_operator_id: parkOperatorId,
                    });
                    return connection($holidaypark_operator_packages);
                },
```

this caused issues because they're reading the raw value from `$ID` which represents the value that it had at planning time, and not necessarily the value it will have a future runtimes.

We should make sure things like `value` here are hidden away, perhaps using symbols, or private properties, such that users cannot accidentally read these values when planning and think they know what to do.