Merge branch 'pin-conformance-tester' of https://github.com/eiriktsarpalis/csharp-sdk into pin-conformance-tester

Author: eiriktsarpalis

tests/ModelContextProtocol.ConformanceServer/Program.cs

@@ -94,7 +94,6 @@ public static async Task MainAsync(string[] args, ILoggerProvider? loggerProvide
 
         app.MapMcp();
 
-        // Return plain string to avoid JSON serialization issues when reflection is disabled
         app.MapGet("/health", () => "Healthy");
 
         await app.RunAsync(cancellationToken);