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/npc/tell_state.rs

@@ -247,6 +247,7 @@ mod tests {
         NpcRoutineDeviation {
             trigger: DeviationTrigger::WalkAway,
             tick: 100,
+            expires_at_tick: 500,
         }
     }