chore(resilience): Railway cron for weekly validation suite (T2.7) (#2988)

* chore(resilience): Railway cron for weekly benchmark + backtest + sensitivity (Phase 2 T2.7)

* fix(resilience): remove validation suite from seed-health monitoring (#2988 P2)

Validation scripts (benchmark, backtest, sensitivity) produce audit
artifacts, not product data. They don't write seed-meta heartbeats,
so seed-health permanently reported them as missing/stale. Removed
the three entries from api/seed-health.js and api/health.js. The
weekly cron bundle still runs all three scripts every invocation,
which is the correct behavior for a validation suite.

* fix(resilience): use WEEK constant in validation bundle (#2988 review)

scripts/seed-bundle-resilience-validation.mjs

@@ -0,0 +1,23 @@
+#!/usr/bin/env node
+import { runBundle, WEEK } from './_bundle-runner.mjs';
+
+await runBundle('resilience-validation', [
+  {
+    label: 'External-Benchmark',
+    script: 'benchmark-resilience-external.mjs',
+    intervalMs: WEEK,
+    timeoutMs: 300_000,
+  },
+  {
+    label: 'Outcome-Backtest',
+    script: 'backtest-resilience-outcomes.mjs',
+    intervalMs: WEEK,
+    timeoutMs: 300_000,
+  },
+  {
+    label: 'Sensitivity-Suite',
+    script: 'validate-resilience-sensitivity.mjs',
+    intervalMs: WEEK,
+    timeoutMs: 600_000,
+  },
+]);

tests/seed-bundle-resilience-validation.test.mjs

@@ -0,0 +1,74 @@
+import assert from 'node:assert/strict';
+import { existsSync } from 'node:fs';
+import { readFile } from 'node:fs/promises';
+import { dirname, join } from 'node:path';
+import { describe, it } from 'node:test';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const scriptsDir = join(__dirname, '..', 'scripts');
+
+const EXPECTED_SECTIONS = [
+  {
+    label: 'External-Benchmark',
+    script: 'benchmark-resilience-external.mjs',
+  },
+  {
+    label: 'Outcome-Backtest',
+    script: 'backtest-resilience-outcomes.mjs',
+  },
+  {
+    label: 'Sensitivity-Suite',
+    script: 'validate-resilience-sensitivity.mjs',
+  },
+];
+
+describe('seed-bundle-resilience-validation', () => {
+  let src;
+
+  it('bundle script exists and parses', async () => {
+    const bundlePath = join(scriptsDir, 'seed-bundle-resilience-validation.mjs');
+    assert.ok(existsSync(bundlePath), 'bundle script must exist on disk');
+    src = await readFile(bundlePath, 'utf8');
+    assert.ok(src.includes("runBundle('resilience-validation'"), 'must call runBundle with correct label');
+  });
+
+  it('has exactly 3 sections with correct labels (no seedMetaKey — validation scripts are not data seeders)', async () => {
+    if (!src) src = await readFile(join(scriptsDir, 'seed-bundle-resilience-validation.mjs'), 'utf8');
+
+    for (const section of EXPECTED_SECTIONS) {
+      assert.ok(src.includes(`label: '${section.label}'`), `missing label: ${section.label}`);
+      assert.ok(src.includes(`script: '${section.script}'`), `missing script ref: ${section.script}`);
+    }
+    assert.ok(!src.includes('seedMetaKey'), 'validation bundle must NOT have seedMetaKey (no seed-meta heartbeats)');
+  });
+
+  it('all intervals use WEEK constant (weekly)', async () => {
+    if (!src) src = await readFile(join(scriptsDir, 'seed-bundle-resilience-validation.mjs'), 'utf8');
+
+    const intervalMatches = src.match(/intervalMs:\s*(.+),/g);
+    assert.equal(intervalMatches.length, 3, 'must have exactly 3 intervalMs entries');
+    for (const m of intervalMatches) {
+      assert.ok(m.includes('WEEK'), `intervalMs must use WEEK, got: ${m}`);
+    }
+  });
+
+  it('imports WEEK from _bundle-runner.mjs', async () => {
+    if (!src) src = await readFile(join(scriptsDir, 'seed-bundle-resilience-validation.mjs'), 'utf8');
+    assert.ok(src.includes("WEEK") && src.includes("_bundle-runner.mjs"), 'must import WEEK from _bundle-runner');
+  });
+
+  it('validate-resilience-sensitivity.mjs exists on disk', () => {
+    assert.ok(
+      existsSync(join(scriptsDir, 'validate-resilience-sensitivity.mjs')),
+      'validate-resilience-sensitivity.mjs must exist',
+    );
+  });
+
+  it('bundle runner exists on disk', () => {
+    assert.ok(
+      existsSync(join(scriptsDir, '_bundle-runner.mjs')),
+      '_bundle-runner.mjs must exist',
+    );
+  });
+});