feat(openwiki v0.3.1): add YAML frontmatter + install-id markers from initial init run (2026-08-07)

sources/feishu-mail.md

@@ -1,3 +1,9 @@
+---
+type: "Reference"
+title: "飞书邮箱 (Robin customer mailbox)"
+openwiki_generated: true
+---
+
 # 飞书邮箱 (Robin customer mailbox)
 
 > 数据源: Robin 的飞书邮箱 (imap.feishu.cn:993 或 imap.larksuite.com:993)