chore: sync testing plan with gateway

gateway/internal/events/grpc_integration_test.go

@@ -234,16 +234,27 @@ func (g runningAuthenticatedGateway) stop(t *testing.T) {
 func dialGatewayClient(t *testing.T, addr string) *grpc.ClientConn {
 	t.Helper()
 
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
-	defer cancel()
+	var conn *grpc.ClientConn
+	require.Eventually(t, func() bool {
+		ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
+		defer cancel()
 
-	conn, err := grpc.DialContext(
-		ctx,
-		addr,
-		grpc.WithTransportCredentials(insecure.NewCredentials()),
-		grpc.WithBlock(),
-	)
-	require.NoError(t, err)
+		candidate, err := grpc.DialContext(
+			ctx,
+			addr,
+			grpc.WithTransportCredentials(insecure.NewCredentials()),
+			grpc.WithBlock(),
+		)
+		if err != nil {
+			if candidate != nil {
+				_ = candidate.Close()
+			}
+			return false
+		}
+
+		conn = candidate
+		return true
+	}, 2*time.Second, 10*time.Millisecond, "gateway did not accept gRPC connections")
 
 	return conn
 }