fix(simulation): resolve duplicate examine_result field and regenerate fixtures

Removed duplicate examine_result from ObserverSnapshot (old ExamineResultEvent
superseded by ExamineResultWire). Fixed serde_default test version assertion.
Regenerated golden file and all fixture .msgpack files. 1070 Rust tests passing.

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

server/src/perception/observer/mod.rs

@@ -203,7 +203,13 @@ pub fn compute_observer_snapshot(
 
     let current_monologue = monologue_buffer.take();
     let dialogue_response = dialogue_response_opt.as_mut().and_then(|buf| buf.take());
-    let examine_result = examine_result_buffer_opt.as_mut().and_then(|buf| buf.take());
+    let examine_result = examine_result_buffer_opt.as_mut().and_then(|buf| buf.take()).map(
+        |evt| crate::bridge::types::ExamineResultWire {
+            entity_id: evt.target_entity_id,
+            text: evt.text,
+            confidence: crate::knowledge::types::KnowledgeConfidence::KnowsDetails,
+        },
+    );
     let scan_events = scan_event_buffer_opt
         .as_mut()
         .map(|buf| buf.take())
@@ -403,7 +409,6 @@ pub fn compute_observer_snapshot(
         sound_events,
         rng_seed: sim_rng.as_deref().map(|r| r.seed()),
         poi_list,
-        examine_result: None, // Populated by examine system when #242 lands
         player_knowledge,
     });
 }