Enumerates the active Realtime models with each driver's supported voices — the source for the dev
model/voice picker. Only models with an Active vendor + resolvable API key + ClassFactory driver are
returned (a model you can't actually run isn't worth offering). Voices come from the driver
(BaseRealtimeModel.SupportedVoices) — the near-term, driver-owned source of truth.
Enumerates the active Realtime models with each driver's supported voices — the source for the dev model/voice picker. Only models with an Active vendor + resolvable API key + ClassFactory driver are returned (a model you can't actually run isn't worth offering). Voices come from the driver (BaseRealtimeModel.SupportedVoices) — the near-term, driver-owned source of truth.