chore(claudedo): update CHANGELOG for v2.13.3

Default of 1 serializes every hub call on a connection - a slow one
(GetTicketProjects hitting an unreachable ticket system, 10s timeout)
blocked unrelated calls like UpdateList/UpdateListConfig behind it for
the same duration, making list-settings save appear to hang.

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## v2.13.3 — 2026-09-03
+
+### Fixes
+
+- raise SignalR MaximumParallelInvocationsPerClient so a slow hub call (e.g. an unreachable ticket system) can't block unrelated ones like list-settings save (b4144e6b)
+
 ## v2.13.2 — 2026-09-03
 
 ### Features

src/ClaudeDo.Worker/Program.cs

@@ -78,10 +78,14 @@ builder.Services.AddHostedService<AttachmentOrphanRecovery>();
 builder.Services.AddHostedService<PromptFileRecovery>();
 builder.Services.AddHostedService<LegacyWorktreeFolderRecovery>();
 builder.Services.AddHostedService<UntrackedWorktreeRecovery>();
-builder.Services.AddSignalR().AddJsonProtocol(options =>
-{
-    options.PayloadSerializerOptions.Converters.Add(new System.Text.Json.Serialization.JsonStringEnumConverter());
-});
+// Default MaximumParallelInvocationsPerClient=1 serializes every hub call on one connection —
+// a slow one (e.g. GetTicketProjects hitting an unreachable ticket system) blocks unrelated
+// calls like UpdateList/UpdateListConfig behind it for the same 10s.
+builder.Services.AddSignalR(options => options.MaximumParallelInvocationsPerClient = 10)
+    .AddJsonProtocol(options =>
+    {
+        options.PayloadSerializerOptions.Converters.Add(new System.Text.Json.Serialization.JsonStringEnumConverter());
+    });
 
 // Runner stack.
 builder.Services.AddSingleton<IClaudeProcess, ClaudeProcess>();