fix: unify pyannote validation toggle

MeetingAssistant/MeetingAssistantOptions.cs

@@ -183,10 +183,8 @@ public sealed class WhisperLocalOptions
     public PyannoteDiarizationOptions Diarization { get; set; } = new();
 }
 
-public sealed class PyannoteDiarizationOptions
+public class PyannoteRuntimeOptions
 {
-    public bool Enabled { get; set; } = true;
-
     public string DockerCommand { get; set; } = "docker";
 
     public string BaseImage { get; set; } = "python:3.11-slim";
@@ -210,6 +208,11 @@ public sealed class PyannoteDiarizationOptions
     public TimeSpan CommandTimeout { get; set; } = TimeSpan.FromMinutes(30);
 }
 
+public sealed class PyannoteDiarizationOptions : PyannoteRuntimeOptions
+{
+    public bool Enabled { get; set; } = true;
+}
+
 public sealed class AzureSpeechOptions
 {
     public string Endpoint { get; set; } = "";
@@ -367,9 +370,8 @@ public sealed class SpeakerIdentityPyannoteValidationOptions
 
     public double MinimumMatchingKnownSnippetRatio { get; set; } = 0.50;
 
-    public PyannoteDiarizationOptions Diarization { get; set; } = new()
+    public PyannoteRuntimeOptions Diarization { get; set; } = new()
     {
-        Enabled = true,
         CommandTimeout = TimeSpan.FromHours(1),
         AlignmentMode = PyannoteAlignmentMode.PyannoteTurns
     };