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/dialogue.rs

@@ -765,6 +765,7 @@ pub fn process_walk_away(
             .insert(crate::npc::RoutineDeviation {
                 trigger: crate::npc::DeviationTrigger::WalkAway,
                 tick: time.tick,
+                expires_at_tick: time.tick + crate::npc::TELL_ESCALATION_DURATION_TICKS,
             });
 
         // Phase 3: Emit IncompleteInteraction knowledge event
@@ -868,6 +869,7 @@ pub fn process_confrontation_response(
         crate::npc::RoutineDeviation {
             trigger: crate::npc::DeviationTrigger::Confrontation,
             tick: time.tick,
+            expires_at_tick: time.tick + crate::npc::TELL_ESCALATION_DURATION_TICKS,
         },
     ));