lib update; better connection status tracking

StackExchange.Redis/PhysicalBridge.cs

@@ -264,7 +264,7 @@ internal void KeepAlive()
             {
                 msg.SetInternalCall();
                 Multiplexer.Trace("Enqueue: " + msg);
-                Multiplexer.OnInfoMessage($"heartbeat ({physical?.LastWriteSecondsAgo}s >= {ServerEndPoint?.WriteEverySeconds}s) '{msg.CommandAndKey}' on '{PhysicalName}' (v{features.Version})");
+                Multiplexer.OnInfoMessage($"heartbeat ({physical?.LastWriteSecondsAgo}s >= {ServerEndPoint?.WriteEverySeconds}s, {physical?.GetSentAwaitingResponseCount()} waiting) '{msg.CommandAndKey}' on '{PhysicalName}' (v{features.Version})");
                 physical?.UpdateLastWriteTime(); // pre-emptively
                 var result = TryWrite(msg, ServerEndPoint.IsSlave);
 

StackExchange.Redis/PhysicalConnection.cs

@@ -335,7 +335,7 @@ public Task FlushAsync()
                         }
                         if (sc.BytesRead == 0) exMessage.Append(", 0-read");
                         if (sc.BytesSent == 0) exMessage.Append(", 0-sent");
-                        exMessage.Append(")");
+                        exMessage.Append(", last-recv: ").Append(sc.LastReceived).Append(")");
                     }
 
                     var data = new List<Tuple<string, string>>();
@@ -414,7 +414,6 @@ void add(string lk, string sk, string v)
             Shutdown();
         }
 
-
         internal bool IsIdle() => _writeStatus == WriteStatus.Idle;
         internal void SetIdle() => _writeStatus = WriteStatus.Idle;
         internal void SetWriting() => _writeStatus = WriteStatus.Writing;

StackExchange.Redis/StackExchange.Redis.csproj

@@ -19,7 +19,7 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Pipelines.Sockets.Unofficial" Version="0.2.1-alpha.77" />
+    <PackageReference Include="Pipelines.Sockets.Unofficial" Version="0.2.1-alpha.80" />
     <PackageReference Include="System.Diagnostics.PerformanceCounter" Version="4.5.0" />
     <PackageReference Include="System.IO.Pipelines" Version="4.5.0" />
     <PackageReference Include="System.Threading.Channels" Version="4.5.0" />