pi-ts-aperture v0.19.0

3312ee9: Route classifier models through the gateway: the /v1/models catalog now advertises per-model endpoints (shaped by model_compatibility in the Aperture config), so a model served only over /v1/systemone is exposed as a classifier on the dedicated aperture provider and never as a chat model; dual-protocol models stay chat models. The dedicated provider gains getAllModels plus a classify entry point backed by a re-implemented System One client, the proxy wrapper rewrites classifier models to the gateway base URL while keeping their api, and registry snapshots include classifier models. The catalog key bumps to v3 so pre-classifier caches are never replayed.