2.1.2: Harden cache consistency for media and tree folders

What’s changed

• Tightened folder cache trust rules so ancestor folders are no longer marked ok from partial local patching
• Fixed a remaining media/tree-mode cache hole where root or parent folders could appear empty or partial
• Applied the stricter shared folder-cache behavior consistently across direct CMS writes and webhook incremental updates
• Continued cache hardening around media and collection folder synchronization

How to upgrade

Upgrade to 2.1.2, deploy, then clear cache_file and cache_file_meta once to remove any previously poisoned cache state.

Full Changelog: 2.1.1...2.1.2