fix(api): enhance type safety in pubsub subscription methods

- Updated `createSubscription` and `createTrackedSubscription` methods to include generic type parameters, improving type safety and ensuring correct async iterable handling.

Author: elibosley

api/src/core/pubsub.ts

@@ -15,6 +15,8 @@ export const pubsub = new PubSub({ eventEmitter });
  * Create a pubsub subscription.
  * @param channel The pubsub channel to subscribe to.
  */
-export const createSubscription = (channel: GRAPHQL_PUBSUB_CHANNEL) => {
-    return pubsub.asyncIterableIterator(channel);
+export const createSubscription = <T = any>(
+    channel: GRAPHQL_PUBSUB_CHANNEL
+): AsyncIterableIterator<T> => {
+    return pubsub.asyncIterableIterator<T>(channel);
 };

api/src/unraid-api/graph/services/subscription-helper.service.ts

@@ -16,8 +16,7 @@ export class SubscriptionHelperService {
      * @returns A proxy async iterator with automatic cleanup
      */
     public createTrackedSubscription<T = any>(topic: PUBSUB_CHANNEL): AsyncIterableIterator<T> {
-        const iterator = createSubscription(topic) as AsyncIterable<T>;
-        const innerIterator = iterator[Symbol.asyncIterator]();
+        const innerIterator = createSubscription<T>(topic);
 
         // Subscribe when the subscription starts
         this.subscriptionTracker.subscribe(topic);