feat(app): show GPU metrics in log side panel infrastructure section

.changeset/gpu-metrics-infra-panel.md

@@ -0,0 +1,21 @@
+---
+'@hyperdx/app': minor
+---
+
+Show GPU utilization and GPU memory utilization charts in the log/span side
+panel Infrastructure section when `hw.gpu.*` metrics (OTel hardware semconv)
+exist for the correlated host/node. Multiple GPUs on a host render as separate
+series grouped by `hw.id`, and utilization is split per GPU engine by
+`hw.gpu.task` (general/encoder/decoder) so a node saturated on video encode is
+still visible; a missing task is reported as `general`. The section is fully
+hidden when no GPU metrics are present and partially rendered when only one
+metric is available.
+
+The Infrastructure tab now also treats a Kubernetes resource attribute that is
+present but empty (for example `k8s.node.name: ""`) as absent. Such rows
+previously surfaced an Infrastructure tab that could render nothing.
+
+Fix GPU chart availability leaking across rows: switching the side panel to a
+row on a different host briefly rendered the previous host's set of GPU
+charts, because the availability query keeps the prior result readable while
+the new one runs.

packages/app/src/ChartUtils.tsx

@@ -439,6 +439,11 @@ export const K8S_MEM_NUMBER_FORMAT: NumberFormat = {
   output: 'byte',
 };
 
+export const GPU_UTILIZATION_NUMBER_FORMAT: NumberFormat = {
+  output: 'percent',
+  mantissa: 1,
+};
+
 function inferValueColumns(
   meta: Array<{ name: string; type: string }>,
   excluded: Set<string>,