Define Create-Role-from-Preset DTOs (v2)

Define request/response DTOs for a new API that instantiates a role from an existing role preset into a specified scope. Request: role_preset_id, scope_type, scope_id. Response: the created role. DTOs under common/dto/manager/v2/, shared across GraphQL and REST v2. Distinct from the A-4 auto-apply path: this is a manual apply-a-preset-to-an-existing-scope operation.

JIRA Issue: BA-6319