Required CLI model registries to expose getAvailable() and used that authenticated
set whenever callers omit availableModels. Deferred SDK and bench/dry-balance
resolution now lets configured roles beat unauthenticated catalog id collisions.
Updated resolver test registries and made the #6508 regression omit the explicit
availableModels option, covering the deferred-caller path from the review.
Fixes#6508
roboomp