The behaviour for an action-specific query preparation.

To implement one, simply implement the behaviour. init/1 is defined automatically by use Ash.Resource.Preparation, but can be implemented if you want to validate/transform any options passed to the module.

The main function is prepare/3. It takes the changeset, any options that were provided when this change was configured on a resource, and the context, which currently only has the actor.

To access any query arguments from within a preparation, make sure you are using Ash.Query.get_argument/2 as the argument keys may be strings or atoms.