feat(simulation): sprint 12 server — tier system, sound events, KG access, line previewer

Implements 4 completed tickets + partial progress on 2 more:

- #93 Tier marker components (ActiveSim, BackgroundSim, StateSaved + TierPlugin)
- #138 Information tag schema (ObserverAccess enum in knowledge/types.rs)
- #124 Sound event system (SoundEventEmitter, SoundEventQueue, bridge wiring)
- #193 Line previewer CLI (line_preview binary with filter/explain/sequence modes)
- #94 Active tier simulation (in progress — With<ActiveSim> filters)
- #139 Component-level access control (in progress — filter_by_access)

Updates snapshot fixtures and test golden files for new sound_events field.

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

server/src/npc/routine.rs

@@ -8,6 +8,7 @@ use bevy_ecs::prelude::*;
 use crate::npc::{DailyRoutine, Npc};
 use crate::simulation::movement::TilePosition;
 use crate::simulation::pathfinding::PathRequest;
+use crate::simulation::tier::ActiveSim;
 use crate::simulation::time::{DayPhase, SimulationTime};
 
 /// Resource tracking the previous day phase for transition detection.
@@ -28,11 +29,14 @@ impl Default for PreviousDayPhase {
 
 /// System: detect day-phase transitions and issue PathRequests for NPC routines.
 /// Runs after advance_tick so the current phase is up-to-date.
+///
+/// Scoped to `ActiveSim` NPCs — only active-tier NPCs receive routine-based
+/// PathRequests on phase transitions (D-026, #94).
 pub fn check_phase_transition(
     time: Res<SimulationTime>,
     mut previous: ResMut<PreviousDayPhase>,
     mut commands: Commands,
-    npcs: Query<(Entity, &TilePosition, &DailyRoutine), With<Npc>>,
+    npcs: Query<(Entity, &TilePosition, &DailyRoutine), (With<Npc>, With<ActiveSim>)>,
 ) {
     let current_phase = time.day_phase();
     let current_day = time.day();