Sync-in 2.3: Markdown editor and trash retention

[johaven]

📢 Announcement: https://sync-in.com/news/sync-in-2-3/

📝 Built-in Markdown editor with visual and source modes
🗑️ Optional trash retention policy for better cleanup control
📦 Storage quota synchronization via LDAP and OIDC
🔎 More robust search and content indexing
🛡️ Safer uploads, improved file editing, and CVE-2026-47684 fix with stronger SSRF protection
✨ …and many more improvements across the platform!

https://github.com/Sync-in/server/releases/tag/v2.3.0