✨ Gateway readiness check

DysonNetwork.Gateway/Health/GatewayStatusController.cs

@@ -0,0 +1,14 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace DysonNetwork.Gateway.Health;
+
+[ApiController]
+[Route("/health")]
+public class GatewayStatusController(GatewayReadinessStore readinessStore) : ControllerBase
+{
+    [HttpGet]
+    public ActionResult<GatewayReadinessState> GetHealthStatus()
+    {
+        return Ok(readinessStore.Current);
+    }
+}