v2 - 2026-09-22 - Entity types are workspace-specific

Changed EntityType from a fixed enum to an open string. The types available to you depend on your workspace configuration; use List entity configurations as the authoritative list and the type of each returned configuration as the filter value. New entity types become available without a specification change.
List entities type[] values that your workspace does not have now return 400 request.invalid with a detail naming the types that are available. The error code is unchanged; only the message changed.
Retrieve entity configuration A type your workspace does not have now returns 400 request.invalid listing the available types instead of 404 entityType.notFound. Unknown types return request.invalid instead of validation.request.parameter.schema.enum.
Create entity An unavailable data.type returns 400 request.invalid with the available types in detail instead of validation.request.body.schema.enum.
Search entities, List relationships and List field values validate their type filters against the same workspace list.
Clients generated from the OpenAPI specification no longer get an EntityType enum; the field is a string. Values on the wire are unchanged.