feat(simulation): protocol v14 — POI list, examine result, player knowledge wire types

Add three new ObserverSnapshot fields for client Sprint 18 tickets:
poi_list (Vec<PoiWire>) for minimap #151, examine_result
(Option<ExamineResultWire>) for #174, player_knowledge
(Option<PlayerKnowledgeWire>) for journal #264. POI list populated
live from KG-discovered PointOfInterest components. KG dump
serializes entity/fact knowledge with confidence, source, and state.

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

server/tests/bridge_ipc.rs

@@ -67,6 +67,9 @@ fn snapshot_roundtrip_over_unix_socket() {
             conversation_ended: vec![],
             follow_state: None,
             rng_seed: None,
+            poi_list: vec![],
+            examine_result: None,
+            player_knowledge: None,
         };
 
         bridge

server/tests/bridge_tcp.rs

@@ -53,6 +53,9 @@ fn snapshot_roundtrip_over_tcp() {
             conversation_ended: vec![],
             follow_state: None,
             rng_seed: None,
+            poi_list: vec![],
+            examine_result: None,
+            player_knowledge: None,
         };
 
         bridge

server/tests/gen_fixtures.rs

@@ -42,6 +42,9 @@ fn fixture_snapshot(tick: u64, entities: Vec<VisibleEntity>) -> ObserverSnapshot
         conversation_ended: vec![],
         follow_state: None,
         rng_seed: None,
+        poi_list: vec![],
+        examine_result: None,
+        player_knowledge: None,
     }
 }
 
@@ -228,6 +231,9 @@ fn generate_msgpack_fixtures() {
         conversation_ended: vec![],
         follow_state: None,
         rng_seed: None,
+        poi_list: vec![],
+        examine_result: None,
+        player_knowledge: None,
     };
     write_fixture(
         "snapshot_v2_full",

server/tests/golden/proof_room_tick_10.json

@@ -67,11 +67,12 @@
   "player_facing": "North",
   "player_inventory": [],
   "player_stance": "Sprint",
+  "poi_list": [],
   "rng_seed": 42,
   "scan_events": [],
   "sound_events": [],
   "tick": 8,
-  "version": 13,
+  "version": 14,
   "visible_tiles": [
     {
       "tile_kind": "Wall",

server/tests/serialization.rs

@@ -31,6 +31,9 @@ fn test_snapshot(tick: u64, entities: Vec<VisibleEntity>) -> ObserverSnapshot {
         conversation_ended: vec![],
         follow_state: None,
         rng_seed: None,
+        poi_list: vec![],
+        examine_result: None,
+        player_knowledge: None,
     }
 }
 
@@ -276,6 +279,9 @@ fn snapshot_v2_fields_roundtrip() {
         conversation_ended: vec![],
         follow_state: None,
         rng_seed: None,
+        poi_list: vec![],
+        examine_result: None,
+        player_knowledge: None,
     };
 
     let bytes = rmp_serde::to_vec_named(&snapshot).expect("serialize");
@@ -330,7 +336,7 @@ 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"
     );
 }
@@ -375,6 +381,9 @@ fn all_facing_direction_variants_roundtrip() {
             conversation_ended: vec![],
             follow_state: None,
             rng_seed: None,
+            poi_list: vec![],
+            examine_result: None,
+            player_knowledge: None,
         };
         let bytes = rmp_serde::to_vec_named(&snapshot).expect("serialize");
         let decoded: ObserverSnapshot = rmp_serde::from_slice(&bytes).expect("deserialize");
@@ -1418,8 +1427,8 @@ fn serde_default_fields_fill_in_when_missing_from_wire() {
     let decoded: ObserverSnapshot =
         serde_json::from_value(minimal_json).expect("minimal JSON must deserialize");
 
-    // Version and required fields present
-    assert_eq!(decoded.version, PROTOCOL_VERSION);
+    // Version matches what was in the wire (13, simulating older server)
+    assert_eq!(decoded.version, 13);
     assert_eq!(decoded.tick, 42);
     assert_eq!(decoded.entities.len(), 1);
 
@@ -1437,6 +1446,19 @@ fn serde_default_fields_fill_in_when_missing_from_wire() {
         decoded.follow_state.is_none(),
         "follow_state must default to None when absent from wire"
     );
+    // v14 fields default correctly when absent from older wire format
+    assert!(
+        decoded.poi_list.is_empty(),
+        "poi_list must default to empty when absent from wire"
+    );
+    assert!(
+        decoded.examine_result.is_none(),
+        "examine_result must default to None when absent from wire"
+    );
+    assert!(
+        decoded.player_knowledge.is_none(),
+        "player_knowledge must default to None when absent from wire"
+    );
 }
 
 /// A snapshot with version != PROTOCOL_VERSION can be detected by checking