Added cases hash and server to bench report

Author: liammclennan

src/SeqCli/Cli/Commands/Bench/BenchCasesCollection.cs

@@ -22,5 +22,7 @@ namespace SeqCli.Cli.Commands;
  */
 class BenchCasesCollection
 {
+    // An identifier for the particular cases file
+    public int CasesHash = 0;
     public IList<BenchCase> Cases = new List<BenchCase>();
 }

src/SeqCli/Cli/Commands/Bench/BenchCommand.cs

@@ -153,10 +153,8 @@ protected override async Task<int> Run()
                 using (LogContext.PushProperty("Query", c.Query))
                 {
                     reportingLogger.Information(
-                        "Bench run {BenchRunId} for query {Id}: mean {MeanElapsed:N0} ms with relative dispersion {RelativeStandardDeviationElapsed:N2}", 
-                        runId, c.Id,
-                        timings.MeanElapsed, 
-                        timings.RelativeStandardDeviationElapsed);
+                        "Bench run {Cases}/{RunId} against {Server} for query {Id}: mean {MeanElapsed:N0} ms with relative dispersion {RelativeStandardDeviationElapsed:N2}", 
+                                 cases.CasesHash, runId,  _reportingServerUrl,     c.Id,      timings.MeanElapsed,                      timings.RelativeStandardDeviationElapsed);
                 }
             }
 
@@ -198,6 +196,8 @@ static BenchCasesCollection ReadCases(string filename)
         var casesFile = JsonConvert.DeserializeObject<BenchCasesCollection>(casesString)
             ?? new BenchCasesCollection();
 
+        casesFile.CasesHash = casesString.GetHashCode(); // not consistent across framework versions, but that's OK
+        
         if (casesFile.Cases.Select(c => c.Id).Distinct().Count() != casesFile.Cases.Count)
         {
             throw new Exception($"Cases file {filename} contains a duplicate id");