fixing(trace-eap-waterfall): Not implemented error (#93820)

Fixes:
https://sentry.sentry.io/issues/6659460686/?alert_rule_id=10674468&alert_type=issue&notification_uuid=b9ed5d44-caca-4b0e-b01e-e99776038e17&project=11276&referrer=slack

Co-authored-by: Abdullah Khan <[email protected]>

Author: Abdkhan14

static/app/views/performance/newTraceDetails/traceModels/traceTree.tsx

@@ -2286,8 +2286,9 @@ function nodeToId(n: TraceTreeNode<TraceTree.NodeValue>): TraceTree.NodePath {
     }
     if (isSiblingAutogroupedNode(n)) {
       const child = n.children[0]!;
-      if (isSpanNode(child)) {
-        return `ag-${child.value.span_id}`;
+      if (isSpanNode(child) || isEAPSpanNode(child)) {
+        const spanId = isEAPSpanNode(child) ? child.value.event_id : child.value.span_id;
+        return `ag-${spanId}`;
       }
     }
   }