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/monologue.rs

@@ -155,7 +155,7 @@ pub struct MonologueState {
     pub entered: bool,
     /// IDs of lines already shown (dedup within session).
     pub shown_ids: BTreeSet<String>,
-    /// Character type for pool filtering. v0.1: always "detective".
+    /// Character type for pool filtering. Set from CharacterArchetype (#587).
     pub character: String,
     /// Tick of the last observation event we reacted to (#119, observe_npc).
     /// Observation events arrive one tick after the snapshot that caused them,
@@ -171,7 +171,7 @@ impl Default for MonologueState {
             idle_ticks: 0,
             entered: false,
             shown_ids: BTreeSet::new(),
-            // v0.1: default to detective; character selection sets this
+            // Default to detective; overridden by CharacterArchetype at spawn (#587)
             character: "detective".to_string(),
             last_observation_tick: 0,
         }