fix(ci): 修正分布式实现的 staticcheck 错误

迁移 CLI 不再遮蔽 BeginMigration 的错误，拒绝启动时正确返回失败。规范节点批准错误文案和归档 HTTP 状态常量；tar.Reader 已将旧普通文件类型归一化，无需引用已弃用常量。

验证：CI 固定版本 staticcheck 全量通过；cmd/felis、archivetransfer、backup、distributed 的 go test -race 通过。

cmd/felis/node_approve.go

@@ -275,7 +275,7 @@ func approveNode(ctx context.Context, cl client.Client, cs kubernetes.Interface,
 	for _, endpoint := range endpoints {
 		c, err := net.DialTimeout("tcp", endpoint, 5*time.Second)
 		if err != nil {
-			return fmt.Errorf("Velocity host cannot dial backend Service %s: %w", endpoint, err)
+			return fmt.Errorf("velocity host cannot dial backend Service %s: %w", endpoint, err)
 		}
 		c.Close()
 	}
@@ -321,7 +321,7 @@ func approveNode(ctx context.Context, cl client.Client, cs kubernetes.Interface,
 		return err
 	}
 	if len(game.Spec.Ingress) == 0 {
-		return fmt.Errorf("Velocity ingress policy is not configured")
+		return fmt.Errorf("velocity ingress policy is not configured")
 	}
 	prevGame := game.DeepCopy()
 	for _, cidr := range observed {

cmd/felis/server_migrate.go

@@ -76,19 +76,19 @@ func cmdServerMigrate(args []string, stdout, stderr io.Writer) int {
 	var op distributed.Operation
 	switch args[0] {
 	case "start":
-		host, err := config.Load(*cfgPath)
-		if err != nil {
-			fmt.Fprintln(stderr, err)
+		host, cfgErr := config.Load(*cfgPath)
+		if cfgErr != nil {
+			fmt.Fprintln(stderr, cfgErr)
 			return 1
 		}
-		drv, err := openPodStore(ctx, host.Database.URL, "migration", stderr)
-		if err != nil {
-			fmt.Fprintln(stderr, err)
+		drv, dbErr := openPodStore(ctx, host.Database.URL, "migration", stderr)
+		if dbErr != nil {
+			fmt.Fprintln(stderr, dbErr)
 			return 1
 		}
 		defer drv.Close()
 		var owner sql.NullString
-		if err = drv.DB().QueryRowContext(ctx, "SELECT owner_id FROM servers WHERE name=$1 AND deleted_at IS NULL AND retire_requested_at IS NULL", *name).Scan(&owner); err != nil {
+		if err := drv.DB().QueryRowContext(ctx, "SELECT owner_id FROM servers WHERE name=$1 AND deleted_at IS NULL AND retire_requested_at IS NULL", *name).Scan(&owner); err != nil {
 			fmt.Fprintln(stderr, err)
 			return 1
 		}