feat(simulation): character archetype, tell escalation, and news ticker (#587, #589, #591)

- Add character_archetype to StartupMessage with serde default (Detective)
- Bump PROTOCOL_VERSION to 19
- Add escalate_tells_on_activation() and expire_routine_deviations() systems
- RoutineDeviation inserted on triangle NPCs with 300-tick TTL
- Add TickerPool resource with deterministic SimRng rotation (200 ticks)
- Emit current_ticker in ObserverSnapshot when player is in bar zone
- Load ticker YAML from district content directories

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

server/src/simulation/mod.rs

@@ -32,6 +32,7 @@ pub mod spatial;
 pub mod stance;
 pub mod tier;
 pub mod time;
+pub mod ticker;
 pub mod zone;
 
 /// Core simulation plugin
@@ -136,8 +137,17 @@ impl Plugin for SimulationPlugin {
             .add_systems(
                 Update,
                 chunk_streaming::chunk_streaming.before(input::process_player_input),
+            )
+            // News ticker rotation (#591) — deterministic via SimRng, before snapshot.
+            .add_systems(
+                Update,
+                ticker::tick_news_ticker
+                    .before(crate::perception::observer::compute_observer_snapshot),
             );
 
+        // Initialize TickerPool with empty default; populated by ContentPlugin at Startup.
+        app.init_resource::<ticker::TickerPool>();
+
         tracing::debug!("SimulationPlugin initialized");
     }
 }