docs(ci): finalize global install runtime docs and smoke coverage

tests/scripts/installer-ci-contract.test.ts

@@ -0,0 +1,18 @@
+import test from 'node:test';
+import assert from 'node:assert/strict';
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+const workflowPath = path.resolve('.github/workflows/installer-smoke.yml');
+
+test('installer smoke CI workflow exists', async () => {
+  const raw = await fs.readFile(workflowPath, 'utf8');
+  assert.match(raw, /name:\s*Installer Smoke/i);
+});
+
+test('installer smoke CI includes ubuntu and windows jobs', async () => {
+  const raw = await fs.readFile(workflowPath, 'utf8');
+  assert.match(raw, /ubuntu-latest/i);
+  assert.match(raw, /windows-latest/i);
+  assert.match(raw, /beadboard doctor --json/i);
+});