fix: 修复任务生命周期与调度就绪，优化执行和构建开销 (#3069)

* fix: harden task lifecycle and scheduler readiness

* fix: confine log writes to the configured log directory

* fix: verify complete build artifacts and untracked inputs

* fix: reconcile scheduler state and make stop win startup races

* fix: isolate cron generations and serialize scheduler recovery

back/services/http.ts

@@ -39,7 +39,13 @@ export class HttpServerService {
 
   private async tryListen(expressApp: express.Application, port: number, host: string): Promise<Server> {
     return new Promise((resolve, reject) => {
-      const server = expressApp.listen(port, host, () => {
+      // There is one HTTP worker; accepting here avoids primary IPC handoff
+      // for every connection. Restore shared listening for custom clusters.
+      const server = expressApp.listen({
+        port,
+        host,
+        exclusive: process.env.QL_HTTP_SHARED_LISTEN !== 'true',
+      }, () => {
         resolve(server);
       });