fix(worker): filter EF Core/ASP.NET Core noise out of log ring buffer

EF Core logs every SQL statement at Information, which BroadcastLogSink
buffers into LogRingBuffer regardless of level, flooding the Log
Visualizer overlay and worker log file with SQL noise that buries
hand-curated business events. Override both to Warning so real
EF Core / ASP.NET Core problems still surface.

src/ClaudeDo.Worker/Program.cs

@@ -47,6 +47,8 @@ var broadcastSink = new BroadcastLogSink(logBuffer);
 
 builder.Host.UseSerilog((ctx, lc) => lc
     .MinimumLevel.Information()
+    .MinimumLevel.Override("Microsoft.EntityFrameworkCore", Serilog.Events.LogEventLevel.Warning)
+    .MinimumLevel.Override("Microsoft.AspNetCore", Serilog.Events.LogEventLevel.Warning)
     .WriteTo.File(
         System.IO.Path.Combine(logRoot, "worker-.log"),
         rollingInterval: RollingInterval.Day,