[NV] llm-d: bundle multinode_server_logs.tar.gz so EPP/vllm logs reach GHA

Signed-off-by: Ezra Silvera <ezra@il.ibm.com>

Author: ezrasilvera

runners/launch_h200-dgxc-slurm.sh

@@ -129,6 +129,17 @@ if [[ "$IS_MULTINODE" == "true" ]]; then
         tail -F -s 2 -n+1 "$LOG_FILE" --pid=$POLL_PID 2>/dev/null
         wait $POLL_PID
 
+        # Bundle every server-side log into the artifact path the
+        # `Upload server logs` workflow step picks up. Without this, the
+        # llm-d-vllm path (this branch) leaves the logs on the runner
+        # host where the user cannot reach them - epp.log, vllm_*.log,
+        # sidecar_*.log, envoy_*.log, slurm_job-*.{out,err}, etc.
+        if [[ -d "$BENCHMARK_LOGS_DIR" ]] && compgen -G "$BENCHMARK_LOGS_DIR/*" >/dev/null 2>&1; then
+            tar czf "$GITHUB_WORKSPACE/multinode_server_logs.tar.gz" \
+                -C "$BENCHMARK_LOGS_DIR" . 2>/dev/null || \
+                echo "WARNING: failed to bundle multinode_server_logs.tar.gz" >&2
+        fi
+
         # Result collection: same shape as AMD path.
         for result_file in $(find "${BENCHMARK_LOGS_DIR}" -name "${RESULT_FILENAME}*.json" 2>/dev/null); do
             file_name=$(basename "$result_file")