chore(e2e): increase ucind cluster init timeouts, decrease max backoff delay for TCP connection to retry faster

pkg/client/connector/tcp.go

@@ -4,10 +4,12 @@ import (
 	"context"
 	"fmt"
 	"net/netip"
+	"time"
 
 	"github.com/psviderski/uncloud/internal/grpcversion"
 	"golang.org/x/net/proxy"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/backoff"
 	"google.golang.org/grpc/credentials/insecure"
 )
 
@@ -21,10 +23,19 @@ func NewTCPConnector(apiAddr netip.AddrPort) *TCPConnector {
 }
 
 func (c *TCPConnector) Connect(_ context.Context) (*grpc.ClientConn, error) {
+	// Use a faster connection backoff than the default (which grows up to 120s). TCP connections are typically to
+	// local Docker containers (ucind) or LAN machines where long backoff delays are unnecessary.
+	backoffConfig := backoff.DefaultConfig
+	backoffConfig.MaxDelay = 5 * time.Second
+
 	conn, err := grpc.NewClient(
 		c.apiAddr.String(),
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithDefaultServiceConfig(defaultServiceConfig),
+		grpc.WithConnectParams(grpc.ConnectParams{
+			Backoff:           backoffConfig,
+			MinConnectTimeout: 5 * time.Second,
+		}),
 		grpc.WithUnaryInterceptor(grpcversion.ClientUnaryInterceptor),
 		grpc.WithStreamInterceptor(grpcversion.ClientStreamInterceptor),
 	)