chore: update gateway pressure observability

tools/pressure/check_gateway_s1_report.js

@@ -0,0 +1,11 @@
+#!/usr/bin/env node
+const path = require('node:path')
+const { spawnSync } = require('node:child_process')
+
+const reportPath = process.argv[2] || '/tmp/aether_gateway_pressure_s1_1k.json'
+const checker = path.join(__dirname, 'check_gateway_stage_report.js')
+const result = spawnSync(process.execPath, [checker, '--stage', 'S1', reportPath], {
+  stdio: 'inherit',
+})
+
+process.exit(result.status ?? 1)