pipecat/changelog/4249.changed.md

• Updated NvidiaTTSService:
  • Made api_key optional for local NIM deployments
  • Fixed _update_settings to correctly indicate that runtime settings updates (voice, language, quality) take effect on the next turn
  • Replaced per-sentence synchronous synthesize_online calls with async queue-backed gRPC streaming
  • Renamed Riva references to Nemotron Speech