feat(simulation): add NPC name masking with role labels and color index

Server-side infrastructure for information asymmetry in dialogue.
NPCs display role labels (Worker, Supervisor, Patron) instead of
real names until the player explicitly learns them via KG lookup.
NpcColorIndex (stable_id % 8) persists across name reveal.

ConversationEvent and DialogueResponseEvent carry display names +
color indices on the wire with serde(default) for compat.

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

server/tests/game_loop.rs

@@ -10,6 +10,7 @@ use settled_reach_server::knowledge::{KnowledgeGraph, KnowledgePlugin};
 use settled_reach_server::simulation::interaction::NearbyInteractionBuffer;
 use settled_reach_server::simulation::monologue::{MonologueBuffer, MonologueState};
 use settled_reach_server::simulation::movement::{PlayerCharacter, TilePosition, WalkabilityMap};
+use settled_reach_server::npc::relationships::TrustEventQueue;
 use settled_reach_server::simulation::SimulationPlugin;
 use std::io::{BufReader, BufWriter};
 use std::net::{TcpListener, TcpStream};
@@ -30,6 +31,7 @@ fn player_moves_north_through_full_pipeline() {
         app.add_plugins(SimulationPlugin);
         app.add_plugins(BridgePlugin);
         app.add_plugins(KnowledgePlugin);
+        app.init_resource::<TrustEventQueue>();
         app.insert_resource(BridgeResource::new(bridge));
         app.insert_resource(WalkabilityMap::new(32, 32, 1));
         app.world_mut().spawn((