fix(servicemanager): cancel shutdown timeouts after services stop

ts/taskbuffer.classes.servicemanager.ts

@@ -158,12 +158,15 @@ export class ServiceManager {
         runningInLevel.map(async (name) => {
           const service = this.services.get(name)!;
           try {
-            await Promise.race([
-              service.stop(),
-              plugins.smartdelay.delayFor(this.options.shutdownTimeoutMs).then(() => {
-                throw new Error(`Timeout stopping service '${name}'`);
-              }),
-            ]);
+            const timeout = new plugins.smartdelay.Timeout(this.options.shutdownTimeoutMs);
+            const timeoutPromise = timeout.promise.then(() => {
+              throw new Error(`Timeout stopping service '${name}'`);
+            });
+            try {
+              await Promise.race([service.stop(), timeoutPromise]);
+            } finally {
+              timeout.cancel();
+            }
           } catch (err) {
             logger.log('warn', `${this.name}: error stopping '${name}': ${err instanceof Error ? err.message : String(err)}`);
           }