Add monitoring service and database schema

- Implement monitoring service with heartbeat, lease tasks, resume tasks, and task result handling.
- Create monitoring time utilities for business date calculations.
- Add unit tests for date window resolution and business day handling.
- Define database schema for monitoring-related tables including quotas, daily reports, and task management.
- Establish migration scripts for creating and dropping monitoring tables.

apps/admin-web/src/components/MarkdownPreview.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import DOMPurify from "dompurify";
 import MarkdownIt from "markdown-it";
 import { computed } from "vue";
 
@@ -12,7 +13,10 @@ const renderer = new MarkdownIt({
   breaks: true,
 });
 
-const html = computed(() => renderer.render(props.content || ""));
+const html = computed(() => {
+  const rawHtml = renderer.render(props.content || "");
+  return DOMPurify.sanitize(rawHtml);
+});
 </script>
 
 <template>