LoliPickaxe Fabric

Compatibility-only port to Minecraft 1.21.7. Migrates pickaxe/unbreakable/item, selected-main-hand, server-world, killed-advancement and projectile-collision APIs while preserving the frozen gameplay contract: no recipe, the defined 27 special drops, 32-block expanded right-click execution with lightning, 1024-block six-degree swing fallback, execution lifecycle and holder protection, same-item immunity, alternating bundled sounds, and no movement-speed boost. Built, release-contract verified and run to dedicated-server Done with Java 21, Fabric Loader 0.19.3 and Fabric API 0.129.0+1.21.7; GitHub Actions passed.