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/schedule/health.ts

@@ -52,6 +52,9 @@ const check = async (
   callback: sendUnaryData<HealthCheckResponse>,
 ) => {
   switch (call.request.service) {
+    // Local scheduler liveness only: never call HTTP from this probe.
+    case 'scheduler':
+      return callback(null, { status: 1 });
     case 'cron': {
       const healthUrl = `http://localhost:${config.port}${
         config.baseUrl || ''