refactor(server): apply rustfmt and clippy suggestions

Formatting pass across simulation, perception, knowledge, NPC, and
test modules. Includes two clippy fixes in monologue.rs (.values()
instead of for (_, v) pattern).

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

server/src/knowledge/mod.rs

@@ -12,9 +12,7 @@ pub mod graph;
 pub mod registry;
 pub mod types;
 
-pub use events::{
-    KnowledgeEvent, KnowledgeEventQueue, KnowledgeEventType,
-};
+pub use events::{KnowledgeEvent, KnowledgeEventQueue, KnowledgeEventType};
 pub use graph::KnowledgeGraph;
 pub use registry::{EntityRegistry, StableEntityId};
 pub use types::*;
@@ -33,8 +31,7 @@ impl Plugin for KnowledgePlugin {
                 (
                     events::process_knowledge_events
                         .after(crate::perception::observer::compute_observer_snapshot),
-                    events::decay_knowledge
-                        .after(events::process_knowledge_events),
+                    events::decay_knowledge.after(events::process_knowledge_events),
                 ),
             );
         tracing::debug!("KnowledgePlugin initialized");