test(simulation): update protocol fixtures and golden for Sprint 18

Regenerated MsgPack fixtures for protocol v14 (examine_result and
character_pressure fields). Updated golden test, serialization
assertions, and cross-language fixture generator.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/test_world/mod.rs

@@ -183,6 +183,7 @@ pub fn setup_gauntlet(app: &mut App) {
             profile,
             profile.initial_stance(),
             PlayerMoveCooldown::default(),
+            crate::simulation::pressure::CharacterPressure::default(),
         ))
         .id();
     registry.register(player);