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/tests/serialization.rs

@@ -30,6 +30,8 @@ fn test_snapshot(tick: u64, entities: Vec<VisibleEntity>) -> ObserverSnapshot {
         conversation_events: vec![],
         conversation_ended: vec![],
         follow_state: None,
+        examine_result: None,
+        character_pressure: None,
         rng_seed: None,
     }
 }
@@ -275,6 +277,8 @@ fn snapshot_v2_fields_roundtrip() {
         conversation_events: vec![],
         conversation_ended: vec![],
         follow_state: None,
+        examine_result: None,
+        character_pressure: None,
         rng_seed: None,
     };
 
@@ -330,7 +334,7 @@ fn protocol_version_constant_matches_snapshot() {
     let snapshot = test_snapshot(0, vec![]);
     assert_eq!(snapshot.version, PROTOCOL_VERSION);
     assert_eq!(
-        PROTOCOL_VERSION, 13,
+        PROTOCOL_VERSION, 14,
         "bump this assertion when protocol version changes"
     );
 }
@@ -374,6 +378,8 @@ fn all_facing_direction_variants_roundtrip() {
             conversation_events: vec![],
             conversation_ended: vec![],
             follow_state: None,
+            examine_result: None,
+        character_pressure: None,
             rng_seed: None,
         };
         let bytes = rmp_serde::to_vec_named(&snapshot).expect("serialize");
@@ -1379,7 +1385,7 @@ fn serde_default_fields_fill_in_when_missing_from_wire() {
     // `tell_state`, `follow_state`, `rng_seed`, `zone_id`, `object_type`, etc.
     // are all `#[serde(default)]` — they must default to None/empty when absent.
     let minimal_json = serde_json::json!({
-        "version": 13,
+        "version": 14,
         "tick": 42,
         "game_time": {
             "day": 0,