// LlmException from streamChatEnhanced already sent onError via callback - avoid double-send
            logger.warn("LLM error during stream request. sessionId={}, errorCode={}, message={}", sessionId, e.getErrorCode(),
                    e.getMessage(), e);
        } catch (final Exception e) {
            logger.warn("[RAG] Failed to process stream request. sessionId={}, message={}", sessionId, e.getMessage(), e);