Prepare worker and Discord snapshots through bounded catch-up

src/reminders/worker.test.ts

@@ -231,3 +231,17 @@ test('delivered slots skip habit evaluation while later slots and retries remain
     await tick('10:00'); expect(sync).toHaveBeenCalled(); expect(sent).toHaveLength(2);
   } finally { sync?.mockRestore(); f.close(); }
 });
+
+test('reminder catch-up yields and rechecks opt-out before claiming or sending', async () => {
+  const f = fixture(); let requests = 0;
+  try {
+    await f.json('/habits', 'POST', { name: 'Backlog', method: 'tasks', tasks: Array.from({ length: 50 }, (_, i) => ({ name: `Task ${i}` })) }, 201);
+    f.db.insert(reminderSettings).values({ userId: 'alice', ...defaultReminder, enabled: true, updatedAt: 0 }).run();
+    const work = sendDueReminders(f.db, config, async () => { requests++; throw new Error('No sends expected'); }, () => Date.parse('2027-09-04T18:00:00Z'));
+    await new Promise(resolve => setTimeout(resolve, 0));
+    f.db.update(reminderSettings).set({ enabled: false }).run();
+    await work;
+    expect(requests).toBe(0);
+    expect(f.db.select().from(reminderDeliveries).all()).toHaveLength(0);
+  } finally { f.close(); }
+});