4.15.2
(fix): Fix a NullPointerException when generating an SDK with auth: endpoint-security whose
OAuth (or inferred-auth) token endpoint is grouped under a subpackage not named auth.
The RoutingAuthProvider setup previously located the auth client by scanning for a
subpackage literally named auth, yielding null (and an NPE) when the token endpoint
lived in a differently-named group (e.g. token). It now resolves the client from the
token endpoint’s actual subpackage, falling back to the core AuthClient when the token
endpoint sits at the API root.