[cms] add start_time in public cms maintenance api (#2452) (#2472)

Author: shmel1k

ydb/core/cms/api_adapters.cpp

@@ -163,6 +163,7 @@ class TListClusterNodes: public TAdapterActor<
         out.set_host(in.Host);
         out.set_port(in.IcPort);
         out.set_state(ConvertNodeState(in.State));
+        *out.mutable_start_time() = TimeUtil::MicrosecondsToTimestamp(in.StartTime.GetValue());
 
         auto& location = *out.mutable_location();
         location.set_data_center(in.Location.GetDataCenterId());

ydb/core/cms/cms.cpp

@@ -1160,6 +1160,7 @@ void TCms::AddHostState(const TClusterInfoPtr &clusterInfo, const TNodeInfo &nod
     host->SetNodeId(node.NodeId);
     host->SetInterconnectPort(node.IcPort);
     host->SetTimestamp(timestamp.GetValue());
+    host->SetStartTimeSeconds(node.StartTime.Seconds());
     node.Location.Serialize(host->MutableLocation(), false);
     for (auto marker : node.Markers) {
         host->AddMarkers(marker);

ydb/core/protos/cms.proto

@@ -77,6 +77,7 @@ message THostState {
   optional uint32        InterconnectPort = 7;
   repeated EMarker       Markers = 8;
   optional NActorsInterconnect.TNodeLocation Location = 9;
+  optional uint32        StartTimeSeconds = 10;
 }
 
 message TClusterState {

ydb/public/api/protos/draft/ydb_maintenance.proto

@@ -41,6 +41,8 @@ message Node {
         StorageNode storage = 6;
         DynamicNode dynamic = 7;
     }
+    // start_time defines time when node was registered in cms.
+    google.protobuf.Timestamp start_time = 8;
 }
 
 message ListClusterNodesRequest {