fix(consul): fix gRPC health checks and add API Gateway Consul registration

cmd/identity-service/identity_service_fx.go

@@ -418,6 +418,9 @@ func provideIdentityService() fx.Option {
 			// Register health service
 			healthServer := health.NewServer()
 			grpc_health_v1.RegisterHealthServer(grpcServer, healthServer)
+			// Set serving status for the default service (empty string) - this is what Consul checks
+			healthServer.SetServingStatus("", grpc_health_v1.HealthCheckResponse_SERVING)
+			// Also set for the specific service name
 			healthServer.SetServingStatus("identity.v1.IdentityService", grpc_health_v1.HealthCheckResponse_SERVING)
 
 			// Register reflection for grpcurl