chore: fix hws on startup

Author: NathanFlurry

rivetkit-typescript/packages/rivetkit/src/drivers/engine/actor-driver.ts

@@ -702,6 +702,12 @@ export class EngineActorDriver implements ActorDriver {
 				preloadMap,
 			);
 
+			// Resolve start promise after start() fully completes
+			// (including resetSleepTimer). This ensures forceStopActor
+			// cannot call onStop until the actor is fully initialized.
+			handler.actorStartPromise?.resolve();
+			handler.actorStartPromise = undefined;
+
 			logger().debug({ msg: "runner actor started", actorId, name, key });
 		} catch (innerError) {
 			const error =
@@ -1153,14 +1159,13 @@ export class EngineActorDriver implements ActorDriver {
 	}
 
 	async onBeforeActorStart(actor: AnyActorInstance): Promise<void> {
-		// Resolve promise if waiting
 		const handler = this.#actors.get(actor.id);
 		invariant(handler, "missing actor handler in onBeforeActorReady");
 		handler.actorStartError = undefined;
-		handler.actorStartPromise?.resolve();
-		handler.actorStartPromise = undefined;
 
-		// Restore hibernating requests
+		// Restore hibernating requests. The start promise is resolved in
+		// #runnerOnActorStart after start() fully completes (including
+		// resetSleepTimer), so forceStopActor cannot interfere here.
 		const metaEntries = await this.#hwsLoadAll(actor.id);
 		await this.#runner.restoreHibernatingRequests(actor.id, metaEntries);
 	}