fix: clear cache when we load the data (#10528)

This PR fixes the issue when user changes the stream on servicegraph it
should render the actual data from api not from cache

web/src/plugins/traces/ServiceGraph.vue

@@ -499,6 +499,10 @@ export default defineComponent({
       loading.value = true;
       error.value = null;
 
+      // Clear cache to force chart regeneration with fresh data
+      lastChartOptions.value = null;
+      chartKey.value++;
+
       try {
         const orgId = store.state.selectedOrganization.identifier;