fix: cleanup after pieceInstancesLiveQuery

Author: ianshade

meteor/server/api/deviceTriggers/PieceInstancesObserver.ts

@@ -94,5 +94,6 @@ export class PieceInstancesObserver {
 		this.#cancelCache()
 		this.#observers.forEach((observer) => observer.stop())
 		this.#cleanup?.()
+		this.#cleanup = undefined
 	}
 }

meteor/server/api/deviceTriggers/StudioObserver.ts

@@ -235,6 +235,7 @@ export class StudioObserver extends EventEmitter {
 		if (this.#disposed) {
 			// If we were disposed of while waiting for the observer to be created, stop it immediately
 			this.#rundownsLiveQuery.stop()
+			this.#pieceInstancesLiveQuery.stop()
 		}
 	}, REACTIVITY_DEBOUNCE)