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/perception/observer/mod.rs

@@ -31,6 +31,7 @@ use crate::simulation::rng::SimRng;
 use crate::content::template::TriangleCrisisEventQueue;
 use crate::simulation::sound::SoundEventQueue;
 use crate::simulation::stance::Stance;
+use crate::simulation::ticker::{TickerPool, LAST_SHIFT_ZONE_ID};
 use crate::simulation::time::SimulationTime;
 use crate::simulation::zone::ZoneMap;
 
@@ -106,6 +107,7 @@ pub fn compute_observer_snapshot(
     pressure_query: Query<&crate::simulation::pressure::CharacterPressure, With<PlayerCharacter>>,
     error_buffer: Option<ResMut<SimErrorBuffer>>,
     npc_count_query: Query<Entity, With<crate::npc::Npc>>,
+    ticker_pool: Option<Res<TickerPool>>,
 ) {
     let Ok((
         observer_entity,
@@ -437,6 +439,19 @@ pub fn compute_observer_snapshot(
         .map(|mut buf| buf.drain())
         .unwrap_or_default();
 
+    // News ticker (#591): populate when player is in The Last Shift zone.
+    let player_zone = zone_map
+        .as_deref()
+        .map(|zm| zm.zone_at(observer_pos.x, observer_pos.y, observer_pos.z))
+        .flatten();
+    let current_ticker = if player_zone == Some(LAST_SHIFT_ZONE_ID) {
+        ticker_pool
+            .as_deref()
+            .and_then(|pool| pool.current_line().cloned())
+    } else {
+        None
+    };
+
     buffer.snapshot = Some(ObserverSnapshot {
         version: crate::bridge::types::PROTOCOL_VERSION,
         tick: time.tick,
@@ -468,6 +483,7 @@ pub fn compute_observer_snapshot(
         state_hash,
         sim_errors,
         debug_response,
+        current_ticker,
     });
 }