feat(gw): added connection with retry

internal/gw/grpc_client/competition_client.go

@@ -15,7 +15,7 @@ type CompetitionClient struct {
 }
 
 func NewCompetitionClient(ctx context.Context, address string, factory *ClientFactory) (*CompetitionClient, error) {
-	conn, err := factory.GetConnection(ctx, address)
+	conn, err := factory.GetConnectionWithRetry(ctx, address)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create competition client: %w", err)
 	}