[OpenAPI][SOL013] Subscription-related test schemas across multiple APIs may need alignment
OpenAPI Background: Commit 69460fc5 (2025-07-09) proposed breaking change by fixing SubscriptionAuthentication data model. See definitions/SOL012_def.yaml for details.
API-Tests Impact: Subscription-related test schemas may need alignment (e.g. https://forge.etsi.org/rep/nfv/api-tests/-/blob/4.5.1/SOL012/PolicyManagement-API/schemas/PolicySubscriptionRequest.schema.json?ref_type=tags#L54)