Debug logging for auth provider add/remove

See: dotnet/aspnetcore#56205

src/PopForums.Web/Program.cs

@@ -1,4 +1,5 @@
-using Microsoft.AspNetCore.Authorization;
+using System;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.Extensions.DependencyInjection;
 using PopForums.AzureKit;
@@ -11,7 +12,11 @@
 using Microsoft.Extensions.Logging;
 using Microsoft.AspNetCore.ResponseCompression;
 using System.IO.Compression;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Options;
+using PopForums.Configuration;
 
 var builder = WebApplication.CreateBuilder(args);
 var services = builder.Services;
@@ -83,6 +88,10 @@
 services.Configure<BrotliCompressionProviderOptions>(options => options.Level = CompressionLevel.Fastest);
 
 
+// temporary for https://github.com/dotnet/aspnetcore/discussions/56205
+services.RemoveAll<IAuthenticationSchemeProvider>();
+services.AddSingleton<IAuthenticationSchemeProvider, LoggingAuthSchemeProvider>();
+
 var app = builder.Build();
 
 if (!app.Environment.IsDevelopment())
@@ -124,4 +133,23 @@
 	"default",
 	"{controller=Home}/{action=Index}/{id?}");
 
-app.Run();
+app.Run();
+
+
+// temporary for https://github.com/dotnet/aspnetcore/discussions/56205
+
+public class LoggingAuthSchemeProvider(IOptions<AuthenticationOptions> options, IErrorLog logger)
+	: AuthenticationSchemeProvider(options)
+{
+	public override bool TryAddScheme(AuthenticationScheme scheme)
+	{
+		logger.Log(null, ErrorSeverity.Information, $"Adding scheme '{scheme.Name}'.");
+		return base.TryAddScheme(scheme);
+	}
+
+	public override void RemoveScheme(string name)
+	{
+		logger.Log(null, ErrorSeverity.Critical, $"Removing scheme '{name}'!!!{Environment.StackTrace}");
+		base.RemoveScheme(name);
+	}
+}