0.2 Minimal Program.cs

Wire up MVC controllers and add GET /health returning
{ status: "Healthy", mqttConnected: false } (mqttConnected hardcoded
until the MQTT publisher lands). Switch launchSettings.json to port
8080 so the DoD curl works out of the box.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/FrameProcessor/Program.cs

@@ -1,6 +1,9 @@
 var builder = WebApplication.CreateBuilder(args);
+
+builder.Services.AddControllers();
+
 var app = builder.Build();
 
-app.MapGet("/", () => "Hello World!");
+app.MapControllers();
 
 app.Run();