🎁 implement Valkyrie equivalent validations for model resources

[ShanaLMoore]

the resource models are not active model records anyone, therefore we can't use active model validations.

ref:

• https://github.com/samvera/valkyrie/wiki/Defining-change-set-validations

Acceptance Criteria

• if a Generic Work requires a title, the GenericWorkResource should too

Testing Instructions

• Create a Generic Work. Try to save it without entering a title. The work should not persist and throw an error.
  • Enter a title and save. A work should persist.
• Create a Generic Work Resource. Try to save it without entering a title. The work should not persist and throw an error.
  • Enter a title and save. A work should persist.

[ShanaLMoore]

I believe this ticket can be closed.

1. Bulkrax doesn't check for the model's validation.
2. When we see errors like "missing title" it's coming from a bulkrax config instead.