feat(logging): default TaskId enricher with passing tests

src/ClaudeDo.Logging/DefaultTaskIdEnricher.cs

@@ -0,0 +1,15 @@
+using Serilog.Core;
+using Serilog.Events;
+
+namespace ClaudeDo.Logging;
+
+/// <summary>Ensures every log event carries a TaskId property (defaulting to "-")
+/// so the output template's [{TaskId}] column never renders the raw token.</summary>
+public sealed class DefaultTaskIdEnricher : ILogEventEnricher
+{
+    public void Enrich(LogEvent logEvent, ILogEventPropertyFactory propertyFactory)
+    {
+        if (!logEvent.Properties.ContainsKey("TaskId"))
+            logEvent.AddPropertyIfAbsent(propertyFactory.CreateProperty("TaskId", "-"));
+    }
+}

src/ClaudeDo.Logging/Placeholder.cs

@@ -1,3 +0,0 @@
-namespace ClaudeDo.Logging;
-
-internal static class Placeholder;

tests/ClaudeDo.Worker.Tests/ClaudeDo.Worker.Tests.csproj

@@ -25,6 +25,7 @@
     <ProjectReference Include="..\..\src\ClaudeDo.Worker\ClaudeDo.Worker.csproj" />
     <ProjectReference Include="..\..\src\ClaudeDo.Data\ClaudeDo.Data.csproj" />
     <ProjectReference Include="..\..\src\ClaudeDo.Ui\ClaudeDo.Ui.csproj" />
+    <ProjectReference Include="..\..\src\ClaudeDo.Logging\ClaudeDo.Logging.csproj" />
   </ItemGroup>
 
 </Project>

tests/ClaudeDo.Worker.Tests/Logging/DefaultTaskIdEnricherTests.cs

@@ -0,0 +1,49 @@
+using ClaudeDo.Logging;
+using Serilog;
+using Serilog.Context;
+using Serilog.Core;
+using Serilog.Events;
+
+namespace ClaudeDo.Worker.Tests.Logging;
+
+public sealed class DefaultTaskIdEnricherTests
+{
+    private sealed class CollectingSink : ILogEventSink
+    {
+        public List<LogEvent> Events { get; } = new();
+        public void Emit(LogEvent logEvent) => Events.Add(logEvent);
+    }
+
+    [Fact]
+    public void AddsDash_WhenNoTaskIdInScope()
+    {
+        var sink = new CollectingSink();
+        using var logger = new LoggerConfiguration()
+            .Enrich.FromLogContext()
+            .Enrich.With(new DefaultTaskIdEnricher())
+            .WriteTo.Sink(sink)
+            .CreateLogger();
+
+        logger.Information("hello");
+
+        var prop = Assert.Single(sink.Events).Properties["TaskId"];
+        Assert.Equal("\"-\"", prop.ToString());
+    }
+
+    [Fact]
+    public void KeepsPushedTaskId_WhenInScope()
+    {
+        var sink = new CollectingSink();
+        using var logger = new LoggerConfiguration()
+            .Enrich.FromLogContext()
+            .Enrich.With(new DefaultTaskIdEnricher())
+            .WriteTo.Sink(sink)
+            .CreateLogger();
+
+        using (LogContext.PushProperty("TaskId", "task-42"))
+            logger.Information("hello");
+
+        var prop = Assert.Single(sink.Events).Properties["TaskId"];
+        Assert.Equal("\"task-42\"", prop.ToString());
+    }
+}