refactor(server): events (#13003)

* refactor(server): events

* chore: better type

---------

Co-authored-by: Daniel Dietzler <mail@ddietzler.dev>

server/test/repositories/event.repository.mock.ts

@@ -3,7 +3,7 @@ import { Mocked, vitest } from 'vitest';
 
 export const newEventRepositoryMock = (): Mocked<IEventRepository> => {
   return {
-    on: vitest.fn(),
+    on: vitest.fn() as any,
     emit: vitest.fn() as any,
     clientSend: vitest.fn(),
     clientBroadcast: vitest.fn(),