chore: 初始开源发布

iotlcm-admin-svr：管理后台服务。

- Go module：iotlcm → git.5iot.com/iotlcm-public/iotlcm-admin-svr（729 文件）
- 凭据与地址脱敏：JWT signingKey（含代码里的 MustGet 默认值）、
  MySQL DSN、Redis 口令、告警邮件发件人邮箱全部改为占位；
  私网 IP → 文档地址段；库名 xiujie_admin → iotlcm
- 真实手机号/邮箱 → 合法 11 位编造号 / example.com
- 移除内部资产：CI 触发器、过时 DDL（sql/db_iotlcm.sql）、
  私有依赖 go get 行、明文 registry 登录口令
- 启动 banner 统一 IOTLCM 方块字 + 社区惯例署名
- Dockerfile 改用公共基础镜像
- 拼错的 RADEME.md → README.md，README 重写
- 需要真实数据库的用例改为可用 IOTLCM_TEST_WITH_DB=1 显式启用
- 补 Apache-2.0 LICENSE，LF 行尾 + .gitattributes

数据库 schema 不随本仓发布（生产 DDL 已过时），README 已说明。

server/internal/tasks/imei_queue.go

@@ -0,0 +1,26 @@
+package tasks
+
+import (
+	"context"
+
+	"github.com/gogf/gf/v2/frame/g"
+
+	"git.5iot.com/iotlcm-public/iotlcm-admin-svr/internal/service"
+)
+
+func init() { RegisterInnerTask("syns_imei_queue", "SynsImeiQueue") }
+
+// SynsImeiQueue is the scheduled entry point for the full IMEI sync.
+//
+// It publishes an empty scope, which the Worker treats as a full sync — the
+// same contract as the status and traffic chains.
+//
+// The IMEI chain re-polls every card (including cards that already have a
+// value), so a device swap is detected. Schedule it less often than the status
+// sync: IMEI only changes when the device changes, while the fixed per-run cost
+// is the same as a status run.
+func (t Task) SynsImeiQueue() {
+	if _, err := service.ImeiQueue().StartImeiRun(context.Background()); err != nil {
+		g.Log().Errorf(context.Background(), "start imei queue sync failed: %+v", err)
+	}
+}