Use non-streaming chat completion for REST endpoint

Ya

17 Machi 2026, 04:03 UTC

Mwandishi

Kamo

Ahadi ya

31f21ee

Streaming over REST with blockLast() was producing empty responses because WebClient's SSE parsing doesn't work reliably with bodyToFlux(String.class). Added handleMessageSync() that uses adapter.chatCompletion() (non-streaming) with proper response handling, message persistence, and usage tracking.