test: prepare phase 9 requalification harness and blocker register

docs/redesign/phase-9/p9-requal-01/performance/playwright.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig } from '../../../../../job-tracker-ui/node_modules/@playwright/test';
+import base from '../../../../../job-tracker-ui/playwright.mariadb.config';
+import path from 'node:path';
+
+if (process.env.JOBTRACKER_MARIADB_BROWSER_PORT !== '33308') throw new Error('Requalification requires pinned loopback port 33308.');
+if (process.env.PLAYWRIGHT_STATIC_EXPORT !== 'true' || process.env.PLAYWRIGHT_PREBUILT_EXPORT !== 'true') {
+  throw new Error('Requalification requires a freshly built production static export.');
+}
+
+const artifacts = path.resolve('../.artifacts/p9-requal-01/performance');
+export default defineConfig({ ...base, testDir: '.', testMatch: 'sustained.spec.ts', workers: 1, retries: 0,
+  timeout: 18 * 60 * 1000, outputDir: path.join(artifacts, 'test-results'),
+  reporter: [['list'], ['json', { outputFile: path.join(artifacts, 'playwright-results.json') }]],
+});