feat: add support for explain prepared query API endpoint

Consul/Interfaces/IPreparedQueryEndpoint.cs

@@ -40,5 +40,6 @@ public interface IPreparedQueryEndpoint
  Task<WriteResult> Delete(string queryID, WriteOptions q, CancellationToken ct = default);
  Task<QueryResult<PreparedQueryExecuteResponse>> Execute(string queryIDOrName, CancellationToken ct = default);
  Task<QueryResult<PreparedQueryExecuteResponse>> Execute(string queryIDOrName, QueryOptions q, CancellationToken ct = default);
+ Task<QueryResult<PreparedQueryExplainResponse>> Explain(string queryIDOrName, QueryOptions q, CancellationToken ct = default);
  }
 }

Consul/PreparedQuery.cs

@@ -211,6 +211,14 @@ public class PreparedQueryExecuteResponse
  public int Failovers { get; set; }
  }
 
+ public class PreparedQueryExplainResponse
+ {
+ /// <summary>
+ /// Query has the fully-rendered query.
+ /// </summary>
+ public PreparedQueryDefinition Query { get; set; }
+ }
+
  public class PreparedQuery : IPreparedQueryEndpoint
  {
  private class PreparedQueryCreationResult
@@ -286,6 +294,19 @@ public Task<WriteResult> Update(PreparedQueryDefinition query, WriteOptions q, C
  {
  return _client.Put(string.Format("/v1/query/{0}", query.ID), query, q).Execute(ct);
  }
+
+ /// <summary>
+ /// Shows which query a name resolves to, the fully interpolated template (if it's a template), as well as additional info about the execution of a query.
+ /// </summary>
+ /// <param name="queryIDOrName">Specifies the UUID of the query to explain. This can also be the name of an existing prepared query,
+ /// or a name that matches a prefix name for a prepared query template</param>
+ /// <param name="q">Query Options</param>
+ /// <param name="ct">Cancellation Token</param>
+ /// <returns>Returns a single prepared query</returns>
+ public Task<QueryResult<PreparedQueryExplainResponse>> Explain(string queryIDOrName, QueryOptions q, CancellationToken ct = default)
+ {
+ return _client.Get<PreparedQueryExplainResponse>(string.Format("/v1/query/{0}/explain", queryIDOrName), q).Execute(ct);
+ } 
  }
 
  public partial class ConsulClient : IConsulClient