ci: validate macOS managed behavior on Ubuntu and stabilize shutdown

MeetingAssistant.Tests/MacOsMeetingAudioSourceTests.cs

@@ -9,6 +9,7 @@ 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;
 
@@ -19,18 +20,15 @@ public sealed class MacOsMeetingAudioSourceTests
     [Fact]
     public void MacOsServiceLauncherDefinesStablePrivacyIdentity()
     {
-        if (!OperatingSystem.IsMacOS())
+        var repositoryDirectory = new DirectoryInfo(AppContext.BaseDirectory);
+        while (repositoryDirectory is not null &&
+            !File.Exists(Path.Combine(repositoryDirectory.FullName, "MeetingAssistant", "MeetingAssistant.csproj")))
         {
-            return;
+            repositoryDirectory = repositoryDirectory.Parent;
         }
 
-        var projectDirectory = Path.GetFullPath(Path.Combine(
-            AppContext.BaseDirectory,
-            "..",
-            "..",
-            "..",
-            "..",
-            "MeetingAssistant"));
+        Assert.NotNull(repositoryDirectory);
+        var projectDirectory = Path.Combine(repositoryDirectory.FullName, "MeetingAssistant");
         var launcherDirectory = Path.Combine(projectDirectory, "Native", "MacOsLauncher");
         var infoPlistPath = Path.Combine(launcherDirectory, "Info.plist");
         var launcherSourcePath = Path.Combine(launcherDirectory, "main.swift");
@@ -54,14 +52,9 @@ public sealed class MacOsMeetingAudioSourceTests
             StringComparison.Ordinal);
     }
 
-    [Fact]
+    [MacOsFact]
     public void NativeAudioCaptureIsPackagedAsSignedMacOsAppForPersistentPrivacyGrant()
     {
-        if (!OperatingSystem.IsMacOS())
-        {
-            return;
-        }
-
         var configuration = new DirectoryInfo(AppContext.BaseDirectory)
             .Parent?.Name ?? "Debug";
         var appPath = Path.GetFullPath(Path.Combine(
@@ -191,6 +184,10 @@ 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.RemoveAll<IMeetingAudioSource>();
                 services.RemoveAll<IMacOsAudioCaptureProcessFactory>();
                 PortableMeetingAudioRegistration.Add(services, isMacOs: true);