chore: 初始开源发布

iotlcm-bot：独立飞书应用机器人（读取 Worker 终态 Run JSON，渲染并发送全量同步结果卡片）。

- Go module：git.5iot.com/iotlcm/iotlcm-bot → git.5iot.com/iotlcm-public/iotlcm-bot
- 飞书凭据占位：appId/appSecret/chatId → ${FEISHU_APP_ID}/${FEISHU_APP_SECRET}/${FEISHU_CHAT_ID}
- 移除内部资产：CI 触发器
- Dockerfile 改用公共基础镜像（golang:1.25-alpine → scratch）
- README 重写（命令/配置/挂载契约/常见问题），去掉内部环境路径
- 补 Apache-2.0 LICENSE，LF 行尾 + .gitattributes

internal/notify/service_test.go

@@ -0,0 +1,40 @@
+package notify
+
+import (
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+)
+
+func TestRunFilesSelectsOnlyTopLevelRunJSON(t *testing.T) {
+	root := t.TempDir()
+	for _, name := range []string{
+		"run-abc.json",
+		"run-full-id.json",
+		"action-abc.json",
+		"sim-status-legacy.json",
+		"run-temp.json.tmp",
+	} {
+		if err := os.WriteFile(filepath.Join(root, name), []byte("{}"), 0o600); err != nil {
+			t.Fatal(err)
+		}
+	}
+	nested := filepath.Join(root, "2026", "09")
+	if err := os.MkdirAll(nested, 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(nested, "run-nested.json"), []byte("{}"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+
+	svc := Service{archiveDir: root}
+	got, err := svc.runFiles()
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := []string{filepath.Join(root, "run-abc.json"), filepath.Join(root, "run-full-id.json")}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("runFiles() = %#v, want %#v", got, want)
+	}
+}