[FA-misc] Scaffold ReportingService project

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

FictionArchive.Service.ReportingService/Program.cs

@@ -0,0 +1,12 @@
+namespace FictionArchive.Service.ReportingService;
+
+public class Program
+{
+    public static void Main(string[] args)
+    {
+        var builder = WebApplication.CreateBuilder(args);
+        var app = builder.Build();
+        app.MapGet("/healthz", () => "ok");
+        app.Run();
+    }
+}