feat: expose BI configuration readiness

src/server/routes/health.test.ts

@@ -0,0 +1,15 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import app from './health.js';
+
+test('separates liveness from configuration readiness', async () => {
+  const liveness = await app.request('/');
+  const readiness = await app.request('/readiness');
+  const liveBody = await liveness.json();
+  const readyBody = await readiness.json();
+
+  assert.equal(liveness.status, 200);
+  assert.equal(liveBody.semantics, 'liveness');
+  assert.equal(readyBody.semantics, 'configuration-only');
+  assert.ok([200, 503].includes(readiness.status));
+});