fix(simulation): wire triangle crisis event queue into observer snapshot

The TriangleCrisisEventQueue was populated by tick_triangle_escalation
but never drained into ObserverSnapshot — clients always saw an empty
vec despite protocol v16 advertising the field. Now drains the queue
each tick and converts to TriangleCrisisEventWire.

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

server/src/perception/observer/tests.rs

@@ -16,6 +16,7 @@ fn setup_world(width: i32, height: i32) -> World {
     world.init_resource::<VisibilityGeometry>();
     world.init_resource::<ActivePerceptionMode>();
     world.init_resource::<crate::simulation::sound::SoundEventQueue>();
+    world.init_resource::<crate::content::template::TriangleCrisisEventQueue>();
     world
 }