perfsprint 18→0：strconv.Itoa/FormatInt/FormatUint/FormatBool 替代 fmt.Sprintf、无动词 fmt.Errorf→errors.New、纯字符串拼接。全部语义等价（已核对 diff）。修正 fixer 遗留的 import 问题（引入 goimports 统一整理）。

Result: {"status":"keep","total_issues":56,"golint_canonicalheader":8,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":3,"golint_modernize":5,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":3,"golint_wastedassign":7,"golint_total":55,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":47}

scripts/live_ch_smoke/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"os"
 	"time"
@@ -32,7 +33,7 @@ func main() {
 
 func run() error {
 	if !db.ChConnReady() {
-		return fmt.Errorf("ChConn not ready — check config.yaml clickhouse.enabled")
+		return errors.New("ChConn not ready — check config.yaml clickhouse.enabled")
 	}
 	ctx := context.Background()
 	chwriter.Init(ctx)
@@ -76,7 +77,7 @@ func waitForSnapshot(ctx context.Context, nodeID string, now time.Time) error {
 		}
 		time.Sleep(pollInterval)
 	}
-	return fmt.Errorf("not flushed within timeout")
+	return errors.New("not flushed within timeout")
 }
 
 func assertLatestIncludes(ctx context.Context, nodeID string, now time.Time) error {