chore: 并入 iotlcm-admin-svr 历史到 admin-svr/（原提交 49818c6）

admin-svr/server/internal/logic/iot/simcardbatch/outbound/utils.go

@@ -0,0 +1,27 @@
+package outbound
+
+import (
+	"sort"
+	"strings"
+)
+
+func uniqueStrings(list []string) []string {
+	if len(list) == 0 {
+		return nil
+	}
+	seen := make(map[string]struct{}, len(list))
+	result := make([]string, 0, len(list))
+	for _, item := range list {
+		item = strings.TrimSpace(item)
+		if item == "" {
+			continue
+		}
+		if _, ok := seen[item]; ok {
+			continue
+		}
+		seen[item] = struct{}{}
+		result = append(result, item)
+	}
+	sort.Strings(result)
+	return result
+}