events-backend: fix error when reading subscription with empty events table

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/events-backend/src/service/EventsPlugin.test.ts

@@ -379,7 +379,7 @@ describe('eventsPlugin', () => {
         await helper.subscribe('tester', ['test']).expect(201);
 
         jest.useFakeTimers({
-          doNotFake: ['nextTick'],
+          advanceTimers: true,
         });
 
         try {

plugins/events-backend/src/service/hub/DatabaseEventBusStore.ts

@@ -447,7 +447,7 @@ export class DatabaseEventBusStore implements EventBusStore {
       // events where read, the last ID out of all events
       .update({
         read_until: this.#db.raw(
-          'COALESCE(last_event_id, (SELECT MAX(id) FROM event_bus_events))',
+          'COALESCE(last_event_id, (SELECT MAX(id) FROM event_bus_events), 0)',
         ),
       })
       .updateFrom({