Grey Knights — Compendium (Wrath & Glory) v0.5.3
Fix: New items lacked _id in 0.5.1; v11+ migration skipped them. This build assigns IDs and reverts to v11 folder-path pack.

Install:
1) Replace Data/modules/gk-greyknight with this folder.
2) Start world, let Foundry migrate packs/gk-items.db -> packs/gk-items/ (LevelDB).
3) In Compendium sidebar → right-click "Grey Knights — Items" → Rebuild Index.
