Phase 5.3 diagnostic command linkage correction (2026-10-03)

Affected: 0.0.14.2-PHASE5-DIAGNOSTIC
Crash: NoSuchMethodError while RegisterCommandsEvent was building commands.
Bad descriptor emitted by temporary compile stub:
  LiteralArgumentBuilder.requires(Predicate) -> LiteralArgumentBuilder
Runtime-compatible 1.20.1 descriptor (verified from existing Phayriosis commands):
  LiteralArgumentBuilder.requires(Predicate) -> ArgumentBuilder
  followed by CHECKCAST LiteralArgumentBuilder
The same erased return rule applies to executes(Command).

Fixed command class was recompiled using correct generic/erased Brigadier stubs.
No scheduler, entity, renderer, culling, impact, or worldgen behavior changed.
