Add meeting workflow automation

MeetingAssistant/MeetingNotes/MeetingArtifactFrontmatter.cs

@@ -10,6 +10,8 @@ public sealed class MeetingArtifactFrontmatter
 
     public DateTimeOffset? EndTime { get; set; }
 
+    public List<string>? Attendees { get; set; }
+
     public string Meeting { get; set; } = "";
 
     public string Transcript { get; set; } = "";
@@ -36,6 +38,7 @@ public static class MeetingArtifactFrontmatterRenderer
         AppendScalar(builder, "title", frontmatter.Title);
         AppendDateTime(builder, "start_time", frontmatter.StartTime);
         AppendDateTime(builder, "end_time", frontmatter.EndTime);
+        AppendListIfNotNull(builder, "attendees", frontmatter.Attendees);
         AppendQuotedIfNotEmpty(builder, "meeting", frontmatter.Meeting);
         AppendQuotedIfNotEmpty(builder, "transcript", frontmatter.Transcript);
         AppendQuotedIfNotEmpty(builder, "assistant_context", frontmatter.AssistantContext);
@@ -142,6 +145,22 @@ public static class MeetingArtifactFrontmatterRenderer
         builder.AppendLine(value is null ? "\"\"" : EscapeQuoted(value.Value.ToString("O")));
     }
 
+    private static void AppendListIfNotNull(StringBuilder builder, string key, IReadOnlyList<string>? values)
+    {
+        if (values is null)
+        {
+            return;
+        }
+
+        builder.Append(key);
+        builder.AppendLine(":");
+        foreach (var value in values)
+        {
+            builder.Append("- ");
+            builder.AppendLine(EscapeListItem(value));
+        }
+    }
+
     private static void AppendBlockScalar(StringBuilder builder, string key, string value)
     {
         if (string.IsNullOrEmpty(value))