feat(simulation): sprint 10 — hub teleport, confrontation response, walk-away phase 2, gauntlet rooms 4-7, blocked_entities debug field

#491: PlayerAction::TeleportToHub — moves player to hub spawn, clears
dialogue/monologue/interaction buffer, Gauntlet-only with log warning.
#520: ConfrontationDelivered event — Tier 2 animation shift, relationship
state decrement (D-033), monologue spike emission.
#519: Walk-away Phase 2 — NPC animation shift + routine deviation on
dialogue exit (D-064).
#498: Four new Gauntlet rooms — Interaction Gallery, Fog Theater, Crowd
Plaza, Dialogue Room with constants and wiring.
#514: blocked_entities Vec<u64> on ObserverSnapshot, protocol v9.

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

server/src/simulation/monologue.rs

@@ -108,6 +108,12 @@ impl MonologueBuffer {
     pub fn take(&mut self) -> Option<MonologueEvent> {
         self.event.take()
     }
+
+    /// Set a monologue event, replacing any pending event.
+    /// Used by confrontation response (#520, D-063) to emit a monologue spike.
+    pub fn set(&mut self, event: MonologueEvent) {
+        self.event = Some(event);
+    }
 }
 
 /// Queued sprint anomaly for delayed "double-take" monologue (#428, D-055).