Update forecaster.proto

import "context.proto";

service ForecasterService {

  rpc GetForecastOfLink(context.LinkId) returns (context.Empty) {}

  rpc GetForecastOfTopology (context.TopologyId) returns (Forecast) {}

  rpc GetForecastOfLink(context.LinkId) returns (Forecast) {}

  rpc CheckService (context.ServiceId) returns (ForecastPrediction) {}

}

Forecast {

message SingleForecast {

  context.Timestamp = 1;

  double value = 2;    

}

message LinkForecast {

    LinkId link_id = 1;

    repeated Forecast forecast = 2;

message Forecast {

    oneof uuid {

      context.TopologyId = 1;

      context.LinkId = 2;

    }

    repeated SingleForecast forecast = 3;

}

enum AvailabilityPredictionEnum {