fix DI errors when using TimeService

packages/backend/src/core/TimeService.ts

@@ -10,9 +10,12 @@ import { bindThis } from '@/decorators.js';
  * Provides abstractions to access the current time.
  * Exists for unit testing purposes, so that tests can "simulate" any given time for consistency.
  */
+@Injectable()
 export abstract class TimeService<TTimer extends Timer = Timer> implements OnApplicationShutdown {
 	protected readonly timers = new Map<symbol, TTimer>();
 
+	protected constructor() {}
+
 	/**
 	 * Returns Date.now()
 	 */
@@ -91,6 +94,10 @@ export class NativeTimeService extends TimeService<NativeTimer> implements OnApp
 		return Date.now();
 	}
 
+	public constructor() {
+		super();
+	}
+
 	protected startNativeTimer(timerId: symbol, repeating: boolean, callback: () => void, delay: number): NativeTimer {
 		// Wrap the caller's callback to make sure we clean up the registration.
 		const wrappedCallback = () => {