fix: disable recordInputs to prevent Langfuse media upload timeout

When images are included in chat messages, the AI SDK telemetry with
recordInputs: true sends base64 image data to Langfuse. Langfuse then
attempts to upload these images to media storage, causing 1m31s timeouts.

Setting recordInputs: false prevents this while still capturing user
text input via setTraceInput().

lib/langfuse.ts

@@ -72,7 +72,9 @@ export function getTelemetryConfig(params: {
 
   return {
     isEnabled: true,
-    recordInputs: true,
+    // Disable automatic input recording to avoid uploading large base64 images to Langfuse media
+    // User text input is recorded manually via setTraceInput
+    recordInputs: false,
     recordOutputs: true,
     metadata: {
       sessionId: params.sessionId,