Fix uncaught error in ai conversation endpoint

Author: bigfluffycookie

packages/server/api/src/app/ai/chat/ai-mcp-chat.controller.ts

@@ -225,11 +225,14 @@ export const aiMCPChatController: FastifyPluginAsyncTypebox = async (app) => {
     try {
       await handleNewMessage(request, reply);
     } finally {
-      // Flush traces to Langfuse (critical for Fastify)
       const spanProcessor = getLangfuseSpanProcessor();
       if (spanProcessor) {
-        await spanProcessor.forceFlush();
-        logger.debug('Flushed Langfuse traces');
+        try {
+          await spanProcessor.forceFlush();
+          logger.debug('Flushed Langfuse traces');
+        } catch (error) {
+          logger.error('Failed to flush Langfuse traces', { error });
+        }
       }
     }
   });