Benchling Fieldset API
A tenant-defined schema interface (also known as a "Fieldset") that groups related fields to be shared across multiple schemas. Fieldsets are created and managed by tenant administrators and belong to an `Organization`. Schemas can implement an interface to inherit its `fieldDefinitions`, ensuring consistent field definitions across entity types. Unlike `StaticSchemaInterface` (which is Benchling-defined and read-only), Fieldsets can be modified by users. May include a `constraint` for uniqueness validation and a `prefix` for ID generation on implementing entities. Can be archived when no longer needed.