fix gateway shell head-of-line blocking

tools/hwlab-gateway-shell.mjs

@@ -36,6 +36,7 @@ async function main() {
   const apiBaseUrl = stripTrailingSlash(args.apiBaseUrl || process.env.HWLAB_GATEWAY_SHELL_API_BASE_URL || DEFAULT_API_BASE_URL);
   const traceId = args.traceId || `trc_gateway_shell_cli_${Date.now()}`;
   const requestId = args.requestId || `req_gateway_shell_cli_${randomUUID()}`;
+  const operationId = args.operationId || `op_gateway_shell_cli_${randomUUID()}`;
   const timeoutMs = boundedPositiveInteger(args.timeoutMs ?? process.env.HWLAB_GATEWAY_SHELL_TIMEOUT_MS, DEFAULT_GATEWAY_SHELL_TIMEOUT_MS, {
     min: 1000,
     max: MAX_GATEWAY_SHELL_TIMEOUT_MS
@@ -56,6 +57,7 @@ async function main() {
     },
     body: {
       projectId: args.projectId || DEFAULT_PROJECT_ID,
+      operationId,
       gatewaySessionId: args.gatewaySessionId || DEFAULT_GATEWAY_SESSION_ID,
       resourceId: args.resourceId || DEFAULT_RESOURCE_ID,
       capabilityId: args.capabilityId || DEFAULT_CAPABILITY_ID,
@@ -123,6 +125,7 @@ function printHelp() {
     "  --cwd WINDOWS_PATH         Gateway-side working directory; prefer this over shell-level cd &&",
     "  --timeout-ms N             Gateway command timeout, default 120000ms; can also use HWLAB_GATEWAY_SHELL_TIMEOUT_MS",
     "  --request-timeout-ms N     HTTP wait timeout; defaults to command timeout plus a small response grace",
+    "  --operation-id ID          Stable operationId to preserve correlation if dispatch times out",
     "  --project-id ID            Default prj_mvp_topology",
     "  --gateway-session-id ID    Default gws_DESKTOP-1MHOD9I",
     "  --resource-id ID           Default res_windows_host",