Add OpenTelemetry tracing and log correlation

interface/grpc/server.go

@@ -11,6 +11,7 @@ import (
 
 	ledgerv1 "gl/gen/ledger/v1"
 
+	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/reflection"
@@ -34,7 +35,7 @@ func Run(ctx context.Context, cfg ServerConfig, handler ledgerv1.GeneralLedgerSe
 func runWithListener(ctx context.Context, shutdownTimeout time.Duration, listener net.Listener, handler ledgerv1.GeneralLedgerServiceServer) error {
 	defer listener.Close()
 
-	server := grpc.NewServer(grpc.ChainUnaryInterceptor(structuredUnaryLogger(), panicRecovery()))
+	server := grpc.NewServer(grpc.StatsHandler(otelgrpc.NewServerHandler()), grpc.ChainUnaryInterceptor(structuredUnaryLogger(), panicRecovery()))
 	ledgerv1.RegisterGeneralLedgerServiceServer(server, handler)
 	reflection.Register(server)