YQ-4272 fixed race in compute scheduler (#19396)

Author: GrigoriyPA

ydb/core/kqp/node_service/kqp_node_service.cpp

@@ -313,6 +313,10 @@ class TKqpNodeService : public TActorBootstrapped<TKqpNodeService> {
             ActorIdToProto(taskCtx.ComputeActorId, startedTask->MutableActorId());
         }
 
+        if (!schedulerGroup.empty()) {
+            Scheduler->AdvanceTime(TlsActivationContext->Monotonic());
+        }
+
         TCPULimits cpuLimits;
         if (msg.GetPoolMaxCpuShare() > 0) {
             // Share <= 0 means disabled limit

ydb/core/kqp/runtime/kqp_compute_scheduler.cpp

@@ -228,7 +228,7 @@ class TObservableUpdater {
 template<typename T>
 class TParameter : public IObservableValue<T> {
 public:
-    TParameter(TObservableUpdater* engine, double initialValue)
+    TParameter(TObservableUpdater* engine, T initialValue)
         : Value_(initialValue)
         , Updater_(engine)
     {