fix(net): preserve failed session tick stacks

Keep the original exception stack when cleanup succeeds so connected lifecycle failures identify the real packet/event handler instead of the session wrapper.

Co-authored-by: Erik Nilsson <erikn@users.noreply.github.com>

src/AcDream.App/Net/LiveSessionController.cs

@@ -342,6 +342,8 @@ internal sealed class LiveSessionController
                 catch (Exception tickError)
                 {
                     Exception error = StopAfterFailure(tickError);
+                    if (ReferenceEquals(error, tickError))
+                        throw;
                     throw error;
                 }
             });