ci: consolidate platform pipelines and test prerequisites on macOS support

MeetingAssistant.Tests/MacOsMeetingAudioSourceTests.cs

@@ -1,15 +1,14 @@
 using MeetingAssistant.Recording;
+using MeetingAssistant.Speakers;
 using MeetingAssistant.MeetingNotes;
 using MeetingAssistant.Summary;
 using MeetingAssistant.Transcription;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.Mvc.Testing;
 using Microsoft.AspNetCore.TestHost;
 using Microsoft.Data.Sqlite;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
-using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging.Abstractions;
 using System.Net.Http.Json;
 
@@ -164,7 +163,7 @@ public sealed class MacOsMeetingAudioSourceTests
             microphonePcm: Pcm16(2_000),
             systemPcm: Pcm16(10_000));
         var speechPipelines = new CapturingSpeechRecognitionPipelineFactory();
-        var factory = new WebApplicationFactory<Program>().WithWebHostBuilder(builder =>
+        var factory = new IsolatedApplicationFactory().WithWebHostBuilder(builder =>
         {
             builder.ConfigureAppConfiguration((_, configuration) =>
             {
@@ -184,10 +183,7 @@ public sealed class MacOsMeetingAudioSourceTests
             });
             builder.ConfigureTestServices(services =>
             {
-                // The endpoint fixture supplies its own transcription pipeline and does not warm external pyannote models.
-                services.Remove(services.Single(descriptor =>
-                    descriptor.ServiceType == typeof(IHostedService) &&
-                    descriptor.ImplementationType == typeof(PyannoteDiarizationWarmupHostedService)));
+                services.AddHostedService<SpeakerIdentityDatabaseInitializer>();
                 services.RemoveAll<IMeetingAudioSource>();
                 services.RemoveAll<IMacOsAudioCaptureProcessFactory>();
                 PortableMeetingAudioRegistration.Add(services, isMacOs: true);