feat: build vehicle data platform and production pipeline

go/vehicle-gateway/internal/health/health.go

@@ -40,6 +40,7 @@ func NewMux(service string, checks []Check, registry *metrics.Registry) *http.Se
 	mux.Handle("/healthz", handler)
 	mux.Handle("/readyz", handler)
 	if registry != nil {
+		metrics.RegisterServiceInfo(registry, handler.service)
 		mux.Handle("/metrics", metrics.NewHandler(registry))
 	}
 	return mux

go/vehicle-gateway/internal/health/health_test.go

@@ -80,6 +80,13 @@ func TestNewMuxRegistersHealthAndReadinessRoutes(t *testing.T) {
 			t.Fatalf("%s status = %d body=%s", path, response.Code, response.Body.String())
 		}
 	}
+
+	request := httptest.NewRequest(http.MethodGet, "/metrics", nil)
+	response := httptest.NewRecorder()
+	mux.ServeHTTP(response, request)
+	if !strings.Contains(response.Body.String(), `vehicle_service_info{service="vehicle-stat-writer"} 1`) {
+		t.Fatalf("service info metric missing: %s", response.Body.String())
+	}
 }
 
 func TestNewServerReturnsNilWhenAddressIsEmpty(t *testing.T) {