Add failover channel events to activity journal

test/server/activity-journal-service.test.js

@@ -128,6 +128,53 @@ test('journal exposes a latched write failure until a later append succeeds', (t
   assert.equal(service.page().storage.status, 'ready');
 });
 
+
+test('schema version 1 keeps legacy recovery and accepts per-channel health events', (t) => {
+  const filePath = fixture(t);
+  const occurredAt = '2026-08-19T09:00:00.000Z';
+  fs.writeFileSync(filePath, JSON.stringify({
+    schemaVersion: 1,
+    events: [{
+      id: '00000000-0000-4000-8000-000000000001',
+      occurredAt,
+      type: 'failover.recovered',
+      severity: 'info',
+      source: 'failover',
+      dedupeKey: null,
+      data: { role: 'primary', reason: 'primary-recovered' },
+    }],
+  }));
+  let clock = new Date('2026-08-19T10:00:00.000Z');
+  const service = createActivityJournalService({ filePath, now: () => clock });
+  const inputs = [
+    ['failover.primary_unavailable', 'primary', 'warning', 'probe-failed'],
+    ['failover.primary_recovered', 'primary', 'info', 'probe-recovered'],
+    ['failover.reserve_unavailable', 'reserve', 'warning', 'probe-failed'],
+    ['failover.reserve_recovered', 'reserve', 'info', 'probe-recovered'],
+  ];
+  for (const [type, role, severity, reason] of inputs) {
+    service.append({
+      type,
+      severity,
+      source: 'failover',
+      dedupeKey: null,
+      data: { role, reason },
+    });
+    clock = new Date(clock.getTime() + 1_000);
+  }
+
+  const page = service.page();
+  assert.deepEqual(page.events.map(({ type }) => type), [
+    'failover.reserve_recovered',
+    'failover.reserve_unavailable',
+    'failover.primary_recovered',
+    'failover.primary_unavailable',
+    'failover.recovered',
+  ]);
+  assert.deepEqual(page.events.at(-1).data, { role: 'primary', reason: 'primary-recovered' });
+  assert.equal(page.retentionDays, 30);
+  assert.equal(JSON.parse(fs.readFileSync(filePath, 'utf8')).schemaVersion, 1);
+});
 test('journal page parser rejects malformed wire data and strips unknown event fields', (t) => {
   const service = createActivityJournalService({ filePath: fixture(t) });
   service.append(event('wire'));